分类归档 sports

Health is the cornerstone of high-quality life, so more and more people begin to pay attention to health problems.

Dietary supplements have attracted more attention and welcome among the general population (defined as community residents without special nutritional needs) because of their labels such as "beneficial to health", "no side effects" and "disease prevention".

Most people use multivitamin and mineral supplements to ensure adequate intake and prevent or alleviate diseases.

A survey found that 61% people think that nutritional supplements are "fully proved" and 48% people think that supplements are "a simple way to keep healthy" [1]. Some people even regard vitamins and minerals as a means to compensate for bad eating habits such as picky eaters.

Is dietary supplements really a "panacea" that will not do harm to the body, as everyone thinks?

01

What is a dietary supplement?

"

Dietary nutritional supplement is defined as: a kind of food containing certain nutrients, which is produced for the purpose of making up for the possible deficiency in human normal diet and is also an essential nutrient for human body.

Common nutritional supplements may contain one or more of the following dietary components: vitamins, minerals, amino acids, unsaturated fatty acids, etc., or concentrates, metabolites, extracts or combined products of the above components. It can be taken orally in the form of pills, capsules, tablets or liquid, but it cannot replace ordinary food or be used as a dietary substitute.

Source: Qianku.com

02

Will taking dietary supplements be effective?

"

Supplementary nutrients can increase the plasma concentration of corresponding nutrients in a certain range, especially vitamins and fatty acids.

However, the increase in the concentration of nutrients in plasma does not necessarily mean better health, because the circulating concentration may not reflect the storage concentration of nutrients in organs. At the same time, due to the differences in bioavailability and consumption frequency of nutrients from food sources and supplements (such as omega-3 fatty acids, the biochemical forms of fatty acids from dietary sources and supplements are different), even if the normal nutrient concentration is achieved by taking dietary supplements, the body may not be fully and effectively utilized [2].

Up to now, the meta-analysis of studies on multivitamin supplements shows that the use of supplements has no obvious benefits if people have got enough nutrition in food [3]. Most vitamin and mineral supplements have not played an obvious role in the primary prevention of chronic diseases such as cardiovascular time, cancer and cognitive impairment, which shows that most supplements have no significant effect on preventing chronic diseases in normal people [4].

Source: Qianku.com

03

Excessive use of dietary supplements

What are the risks?

"

Dietary supplements are always considered to be "natural", however, the concentrated form of nutrients may expose users to the risk of injury when taking too much.

It is reported that the intake of any nutrients by adults from food does not exceed the safe upper limit, however, the intake of at least one nutrient by 39.8% dietary supplement users exceeds the safe upper limit [5].

1, fat-soluble vitamins

Vitamin A, also known as retinol, lack of retinol will lead to night blindness, and its role in preventing cancer has not been confirmed by research. However, it has been reported that high retinol TNI (> 2 500 g/d) combined with low vitamin D TNI (< 11 g/d) is related to fracture in postmenopausal women, and even long-term excessive supplementation of vitamin A precursor β -carotene group may lead to an increased risk of lung cancer.

Vitamin E is a strong antioxidant, which can protect the stability of cell membrane by interrupting the chain reaction of free radicals, prevent the formation of lipofuscin on the membrane and delay the aging of the body. However, the risk of all-cause death of people who take long-term high-dose vitamin E supplements is significantly increased.

Source: Qianku.com

2, water-soluble vitamins

Vitamin B is the general term for B vitamins. Contains vitamin B1, vitamin B2, vitamin PP, vitamin B6, pantothenic acid, biotin, folic acid and vitamin B12. Folic acid plays an important role in human DNA synthesis and cell development, and its deficiency can lead to megaloblastic anemia. However, current studies show that folic acid supplementation has dual effects on cancer development, and excessive intake of folic acid will significantly increase the liver/body weight ratio, which may promote the development of hepatocellular carcinoma induced by high-fat diet.

Vitamin C participates in the complex metabolic process of the body, can promote growth and enhance the resistance to diseases, and can be used as nutritional supplements and antioxidants. A large number of studies have confirmed that the use of high-dose vitamin C has little effect on cancer, cardiovascular disease and infection in the general population. Compared with fat-soluble vitamins, vitamin C is relatively safe, but high doses should be used cautiously, which may cause obvious side effects such as urinary calculi in some susceptible patients.

Source: Qianku.com

3. Other supplements

Iron is an essential element to form heme, which is the raw material for synthesizing hemoglobin and myoglobin, and is also an essential substance for promoting vitamin metabolism. Iron supplementation can improve anemia symptoms of cancer patients. However, high plasma ferritin concentration is an indicator of iron accumulation, which may affect the life expectancy of healthy people. People who are not iron deficient will not benefit from iron supplements, and may even cause side effects.

04

How to use nutritional supplements in food and diet

Strike a balance between them?

"

For well-nourished adults, besides iodine and other individual nutrients, priority should be given to obtaining natural nutrients through reasonable dietary collocation.

At present, research shows that the effect of supplements seems to be limited to certain age groups, living environment or diseases with impaired nutrient absorption. Using supplements to solve unhealthy eating patterns is an overly narrow solution.

Dietary supplements should be considered only when the diet cannot meet the nutritional needs.

Dietary nutritional supplements are not the more the better, and should not be used blindly. Appropriate products should be selected and supplemented reasonably under the guidance of doctors or professional nutritionists.

References:

[1] de Jong N, Ocké MC, Branderhorst HA, Friele R. Demographic and lifestyle characteristics of functional food consumers and dietary supplement users. Br J Nutr. 2003 Feb; 89(2):273-81.

[2] Lentjes MAH. The balance between food and dietary supplements in the general population. Proc Nutr Soc. 2019 Feb; 78(1):97-109. Epub 2018 Oct 30.

[3] Fortmann SP, Burda BU, Senger CA, Lin JS, Whitlock EP. Vitamin and mineral supplements in the primary prevention of cardiovascular disease and cancer: An updated systematic evidence review for the U.S. Preventive Services Task Force. Ann Intern Med. 2013 Dec 17; 159(12):824-34.

[4] Grodstein F, O’Brien J, Kang JH, Dushkes R, Cook NR, Okereke O, Manson JE, Glynn RJ, Buring JE, Gaziano M, Sesso HD. Long-term multivitamin supplementation and cognitive function in men: a randomized trial. Ann Intern Med. 2013 Dec 17; 159(12):806-14.

[5] Guallar E, Stranges S, Mulrow C, Appel LJ, Miller ER 3rd. Enough is enough: Stop wasting money on vitamin and mineral supplements. Ann Intern Med. 2013 Dec 17; 159(12):850-1. Erratum in: Ann Intern Med. 2014 Jan 21; 160(2):143.

[6] Li JT, Yang H, Lei MZ, Zhu WP, Su Y, Li KY, Zhu WY, Wang J, Zhang L, Qu J, Lv L, Lu HJ, Chen ZJ, Wang L, Yin M, Lei QY. Dietary folate drives methionine metabolism to promote cancer development by stabilizing MAT IIA. Signal Transduct Target Ther. 2022 Jun 22; 7(1):192. Erratum in: Signal Transduct Target Ther. 2022 Dec 28; 7(1):401.

[7] Doseděl M, Jirkovsky E, Macáková K, Kr?mová LK, Javorská L, Pourová J, Mercolini L, Remi?o F, Nováková L, Mladěnka P, On Behalf Of The Oemonom. Vitamin C-Sources, Physiological Role, Kinetics, Deficiency, Use, Toxicity, and Determination. Nutrients. 2021 Feb 13; 13(2):615.

Author: Wen Jia

Doctor of Anesthesiology, Capital Medical University

Source: Tadpole Staff

Another online celebrity store is involved in the "food safety" storm.

On August 1st, WeChat official account, the WeChat of "Shanghai Good White Phase", posted a message, and some netizens said that they had a dinner with friends at "Xi Lai Xi rou" in Wujiang Road, Shanghai, and ate something suspected of parasites in the barbecue.

　On August 2nd, WeChat official account, a WeChat, said that it was not a parasite, but a pig blood vessel. He also said that the company had communicated with the above-mentioned WeChat WeChat official account, and the contacted "Mr. Xu" proposed to pay a hush fee of 100,000 yuan, which will be paid before 6 pm, otherwise the tweet will be sent again. On the 3rd, the company issued a statement again, saying: Xilai rare meat has complete licenses, and all of them are produced and sold by purchasing goods that meet food safety standards.

On the evening of August 2, Shanghai Jing ‘an District Market Supervision Bureau investigated the safety of Xilai rare meat food overnight, and asked Wujiang Road Store to suspend the sale of the same batch of pork belly, seal all the samples and conduct sampling inspection for further investigation.

Is the food eaten in the barbecue a parasite? It is still an unsolved case.

Special feature of 1905 film network February 22nd, 2022, is also the 22nd of the first month, Tuesday. It seems like an ordinary day, but because of these figures, romantic Chinese gives this day a sense of ceremony. In pronunciation, "2" is close to "love" and is defined by many people. This is the "day with the most love" in the 21st century. Many filmmakers use this as a gimmick.　

Movies and movies will be scheduled for this day for the first time. After all, the usual time for painting movies is usually Friday, and occasionally there are films with high confidence in quality, and only on Thursday at most.　

Among them, when the movie "One Day Only Belongs to Us" was finalized, the original title "Give Me One Day" was changed to the current version, and "The day I love the most in my life, I just want to be with you" was the most important slogan on the movie poster. The design of the games adds interest to this sense of ceremony. For example, on Tuesday, February 22, 2022, at 22:22, it means "the day when I love the most"; Or at 13:14 on May 20th, transliteration "Lifetime".　

According to the statistics of Cat’s Eye Professional Edition, at 22:22 on February 22nd, the movie market arranged a total of 7,546 performances, and sold 56,619 tickets, with a total box office of 2,011,300.　

Is this kind of homophonic terrier, or the special schedule and special games spawned by digital games really effective?

At first glance, it has achieved a little success, and the marketing breakthrough

Eleven years before February 22, 2022 was defined as "the day when I love the most in my life", and November 11, 2011, it was crowned a century-old "God Stick Festival" by the outside world. Compare the box office results of films released on two days.

The single-day box office of Bouquet-like Love was only 9 million, but it became the film with the highest attendance rate that day, which was also higher than the first day box office of another high-profile film previously released by the director in China. "A Day Only for Us" barely passed 2 million, and the overall data was not satisfactory.

The success of the box office released 11 years ago does not need to be described too much. In the era when there was no ticketing app, the cinema could queue up to buy tickets. In the market in recent years, there are few such clever dates worth pondering, but the time itself is a bit embarrassing. Especially at 22:22 on February 22, after many movies ended, it was already after 0 o’clock the next day, which made many people in the workplace flinch.　

In addition to the new films, many films that are still showing are also crazy about the popularity.

The love movie, which was released on February 14th, also featured a special field of "Love You Forever" at 22:22 and a special field of "For Life" at 13:14. Just judging from the single-day box office, this movie with a Douban score of only 4.8 points did not get more box office income.　

Compared with these once-in-a-century days, the "5.20 file" transliteration of "I love you" has also become an important venue for many love movies. The film was released on May 20th, which strengthened this sense of ceremony to the extreme from the distribution level. The key was opened at 13:14, with the intention of "5201314, I love you all my life". What’s more, this movie shows the homophonic stem of time to the fullest, and hardly gives other movies more opportunities. From 13:14 to 22:22, 7 loving time passwords.　

In the end, the film earned nearly 100 million box office on the same day, but it dropped to more than 30 million the next day. Of course, it can’t be ignored that the box office reduction is directly related to the next day’s release. At the same time, the film quality is not recognized by the audience, which is also the key reason. No matter what the result is, many filmmakers have taken a fancy to this brand-new schedule. At present, there are three small and medium-sized love movies with "Can you leave me" scheduled for May 20 this year.　

Returning to the present, this method seems to be coincidental. Considering that there is no ticketing platform to collect more detailed data, the audience portrait and analysis are uncertain, but at least it has gradually emerged from the more conventional "520 files" and various tricks in the market, which has become a breakthrough in the marketing of various film producers.

This kind of digital game is just like the post of "forwarding for good luck" on various social platforms. Whether it is effective or not, the public is also fun.　

For example, the animated film released on February 19 was marked as a special field by the ticketing platform at 14 o’clock that day, "Looking at the pier in the clouds". There was no digital homophonic sound or too much publicity, but it still caused many viewers to be curious about the event and even posted articles on social platforms.　

The imbalance between supply and demand, the key is how to seize the audience.

Compared with the date games mentioned above, the word games of the New Year’s Eve are definitely "the hardest hit". Especially in the 2018 New Year’s Eve movies, the simplest 15-second short video is used to fill up the sense of ceremony of special events. Of course, in exchange for the performance of 2.62 box office on the first day, 10 million on the next day and less than 2 million on the third day. This is enough to become a case that has been constantly discussed and studied in the history of film promotion and marketing in China.　

In the following year, there were such special events, but there were no absolute out-of-circle cases. In 2020, we not only gave suggestions on the number of times to watch movies, so that the audience could embrace the New Year’s Eve at zero, but also put content eggs at the end of the film to push this atmosphere to the highest level.　

Last year, during the pre-sale of the New Year’s Eve, more or less, I tried to catch the audience in this form. At this time, the original state of relatively balanced supply and demand was instantly broken. Hug You Through the Cold Winter and Love by Year itself are more suitable for this kind of marketing. In the former, at 22:02 on December 31st, the subtitle egg "Hug Now" appeared at the end of the film for 5.20 seconds.　

If the emotion of the above two films is more suitable for this kind of marketing, then the crime-themed film "Anti-Corruption Storm 5" seems a bit far-fetched in the 22:25 session on December 31st, playing "I saw the last anti-corruption film on the last day of 2021, and the person I wanted to see at first sight in 2022".　

When all the movies in the same schedule play the same stunt, this kind of marketing will only become a chicken rib performance. In the end, what can really capture the audience is still the elements that return to the content itself, such as the theme type, creativity and word of mouth.　

Hu Jianli, secretary-general of the China Film Critics Association, said frankly when talking about this kind of film marketing, "In fact, we have created it one after another in recent years. The 520 and Qixi stalls, including February 22nd this year, are also an attempt. If the publicity time like this is particularly good, the gap between going to the cinema and expectations is too great. If this happens more often, there will also be a’ wolf coming’ effect. Then in the future, the audience may not believe in the best announcement of the film. "　

The game or homophonic stalk turned by numbers has its own interest, and it has always been the focus of marketing of various businesses. Singles’ Day in double 11 has become a shopping festival today, and "March 14th" has been turned into a "send day" by a fast food brand.

Marketing itself is the act of finding the audience for products, but finding the audience is not simply "killing the goose to get the egg", but should make the audience become the secondary disseminator in marketing. If the film blindly uses marketing to "cheat" the first audience, then the film will only end in tragedy. But who doesn’t expect a happy ending? Special dates and events are the icing itself, but only if the film under the icing is good enough will it really become a golden signboard.

　　Taizhou, 9 June (Reporter Yu Qin)-From 7 to 9 June, Governor Wang Hao inspected and guided the job protection of market players with steady growth and stability in Taizhou, and made in-depth research on the implementation of the central and provincial policies and measures to stabilize the economy. He stressed that it is a clear requirement of the CPC Central Committee that the epidemic should be prevented, the economy should be stabilized and development should be safe. We should thoroughly study and implement the spirit of the important instructions of the Supreme Leader General Secretary, meticulously implement the decision-making arrangements of the CPC Central Committee, the State Council and the Provincial Party Committee on economic work, fully guarantee the smooth flow of logistics, promote the stability of the supply chain of the industrial chain, fully promote innovation and development, accelerate the transformation and upgrading of the industry, and promote economic stabilization and recovery, steady progress and quality improvement with extraordinary efforts and measures to ensure the completion of the annual objectives and tasks.

　　Taizhou is an important manufacturing sector in Zhejiang, with 65 domestic and foreign listed companies, 21 billion-level industrial clusters and 68 national industrial bases. In Wenling, Wang Hao inspected Hotspur Laser Company and Leo Group. In Yuhuan, I visited Damaiyu Port and Supor Company. In Luqiao, Volvo Car Taizhou Factory and Fang Lin used car market were inspected. In Huangyan, we visited the design base of molding industry and Guanghao Optoelectronic Technology Company. Everywhere he went, Wang Hao went deep into the production workshop and project construction site to learn about the changes of the enterprise’s production capacity, orders and sales, to see new products and technologies, and to have face-to-face exchanges with park managers, enterprise leaders and employees returning from other places to Zhejiang, asking whether a series of policies, such as protecting market players, stabilizing jobs and ensuring employment, have been fully fulfilled, what difficulties still exist in production and life after returning to work, and whether wages are normal. Enterprises generally report that the difficulties are mainly concentrated in poor logistics circulation, blocked operation of industrial chain and supply chain, and high operation of commodity prices. Wang Hao listened carefully to the demands of enterprises and asked relevant departments and Taizhou to strengthen research, actively respond and take effective measures to solve them.

　　Wang Hao emphasized that ensuring smooth logistics is an important prerequisite to stabilize the economic market and a key move to promote the stability of the industrial chain supply chain. At present, it is an important task to ensure the smooth flow of logistics. We should speed up the formulation of practical and effective policies and measures to ensure the smooth flow of roads, waterways and ports, and ensure that facilities such as service areas, toll stations and ship locks should be fully opened. In particular, we should enhance the port service capacity, improve efficiency and reduce costs, solve the problems of difficult freight rates for booking, and make every effort to open the main artery and smooth the microcirculation to ensure the importance. Taizhou City should give strong support to industries with limited production capacity caused by poor logistics in the early stage, and speed up their recovery of production capacity, especially for key industries and enterprises such as automobile manufacturing and new materials, and implement "one industry, one policy" and "one enterprise, one policy" to help.

　　Wang Hao emphasized that the transformation and upgrading of Taizhou’s traditional industries has been in a critical period of integration and upgrading. As long as it is transformed, improved and put in place, it will surely release a huge multiplier effect. We should seize the opportunity, adhere to the guidance of innovation, implement the established policies and measures in a down-to-earth manner, promote the "butterfly change" of traditional industries step by step, strive to turn better, bigger, stronger and better, and make greater contributions to promoting high-quality economic development and the construction of common prosperity demonstration zones.

　　Huangyan district is the hometown of tangerines in China, with a long history of planting and many varieties. Wang Hao came to China Citrus Expo Park to investigate the situation of orange fruit hanging, deep processing of products and increasing the income of orange farmers. He said that Huangyan Tangerine is well known, so it is necessary to strengthen the research on the protection of products in the geographical origin, and make great efforts to protect, publicize and promote the brand of Huangyan Tangerine, so that "one fruit" can enrich the people.

　　　 The 26th China Golden Rooster Awards Gala ended successfully on the evening of October 27th at Suzhou Golden Rooster Lake. Fu Dalong, a young actor, won the Best Actor Award for his outstanding performance in the film "Tiangou". China News Agency issued Qiu Yong photo

　　　 On the evening of October 27th, the 16th China Golden Rooster and Hundred Flowers Film Festival was held in Suzhou. The Golden Rooster Award was "Double Yellow Eggs", and Carina Lau won the Best Actress Award for curiosity kills the cat and Yan Bingyan won the Best Actress Award for Teeth of Love. China News Agency issued Qiu Yong photo

　　　　Southern Metropolis Daily reported on October 29 that who was the biggest accident at the award ceremony of the 16th Golden Rooster and Hundred Flowers Film Festival the night before last? Instead of "double yellow eggs", the host Ni Ping subverted the past lyrical and decent style, and the extremely cold and humorous host made many reporters shout, "It’s so cold!" There is no lack of criticism on the internet. After the party, Ni Ping told reporters that there was nothing to explain. The party planner said that Ni Ping’s hosting was very successful.　　

　　　　Preside over the storm

　　　　Who did Ni Ping provoke?　　

　　　　[predecessors]

　　　　Quotation 1: "May you never suffer from Alzheimer’s disease."

　　　　Background: Ni Ping said this to Lu Zhuguo, the screenwriter of the movie My Long March, when he won the Lifetime Achievement Award. Although in the short film shown before, Lu Guozhu said that he would not leave the audience as long as he didn’t suffer from Alzheimer’s disease, Ni Ping’s last sentence was still shocking.

　　　　Quotation 2: "Do you know what fans mean?"

　　　　Background: When Zhang Ruifang, a 90-year-old artist, took the stage to receive the Lifetime Achievement Award, Ni Ping first asked her "What career do you want to be in the next life" and then said, "We are your fans … Do you know what fans are?" Zhang Ruifang said rudely, "I feel like an idiot when you talk to me." When wishing Zhang Ruifang "a long life", some audience members whispered, "The old man is 90 years old. What does it mean to wish her a long life?"? ！” When Zhang Ruifang was helped off the stage, Ni Ping added: "Look, Zhang Ruifang is amazing, and it’s so cool to walk on the road of China movies!"

　　　　[Stars]

　　　　Quotation 1: "Zhu Yuanyuan is a bit like a simpleton."

　　　　Background: When the best actress was announced, Ni Ping did not forget to tease several losers who still had smiles on their faces. "I think Zhu Yuanyuan is a bit like a simpleton and still smirking." After Li Bingbing lost the Golden Rooster and Hundred Flowers Film for three times, Ni Ping commented, "Li Bingbing doesn’t cry this year, you have grown up! I didn’t win the prize last year and cried. " She didn’t leave her greetings to Rene Liu. "Rene Liu, you have won so many winners. Do you care about this winner award? Raise your hand and tell us. " Rene Liu ignored.

　　　　Quotation 2: "It wasn’t you, they gave it to you!"

　　　　Background: When Xiangyu Xiao won the best supporting actress speech on the stage for "Chicken and Dog Restless", Ni Ping asked her to thank the other three nominees. "It wasn’t you, they gave it to you." Embarrassed Xiangyu Xiao briefly. When Qiu Lin, who was shortlisted for best actor and supporting actor, lost the supporting actor, Ni Ping joked with him: "I hope the best actor is you, just wait and buy such an expensive suit."

　　　　[Couples]

　　　　Quotation: "Say you love him quickly, you say it!"

　　　　Background: After Nianping Zeng, the photographer of the film "The Door", won the best photography, Ni Pingxian said, "Don’t thank Li Shaohong if you have the skill", and then almost asked Nianping Zeng to show his love to his wife Li Shaohong in front of the audience in a commanding tone: "You are too busy to talk, and Li Shaohong is crying. Look. Say you love him quickly, or she will cry for nothing. You say! " Turned and ordered Li Shaohong, "Little Red, you should also say that you love him. You don’t scold him less in the cast at ordinary times. Say it! If there is no microphone, just speak loudly below. " When Nianping Zeng stepped down, Ni Ping still remembered the joke, "Nianping can’t walk. He was going to take his left leg, but he still took his right leg."

　　　　[others]

　　　　Mistaken person: When director Fei Mu’s daughter Fei Mingyi and Fei Mu’s version of "Spring in a Small Town" heroine Wei Wei came to the stage to present awards for best film music, Ni Ping mistook them.

　　　　Password sealing: A guest came to the stage to receive the best recording award. Ni Ping said loudly: "Those who receive the award are not allowed to speak."　　

　　　　Netizen’s opinion

　　　　"What happened to Ni Ping?"　　

　　　　Last night, Ni Ping’s appearance as a host completely subverted the previous style, which made some viewers laugh and surprised many people. "What happened to Ni Ping?" The netizens who watched the broadcast commented on Sina Blog, Baidu Post Bar and Tianya Community, and thought that some of Ni Ping’s jokes were not only humorous, but also "somewhat chilling". A netizen who watched the broadcast with her mother said, "We watched it a little sweaty. How can Sister Ni, who has been hosting for so many years, not even care about people’s feelings?"

　　　　In addition to criticizing "Ni Ping’s Quotations", there are also accusations that Ni Ping’s costume that night is too casual. "There is no feeling of stage at all, and his hair is just pulled out." However, some netizens supported Ni Ping’s "not hypocrisy". "Maybe I just want to make the atmosphere."　　

　　　　expert opinion/advice

　　　　Ni Ping no longer talks big.　　

　　　　After hosting the award ceremony last night, Ni Ping said in an interview with reporters that there was nothing to say. "Sorry, I am not the protagonist and don’t want to be in the newspaper." She said, "interview more filmmakers, they are the protagonists." When the reporter called her yesterday, her phone had been transferred to the secretary desk.

　　　　It is reported that Ni Ping won the Golden Rooster in 2002 with the film "Beautiful Feet", and this time he rushed back from the filming scene abroad, and was chosen as the best person to host the award ceremony. Cheng Qingsong, the chief contributor to the award ceremony of this year’s Golden Rooster and Hundred Flowers Film Festival, published a blog yesterday, saying, "From a very fair point of view, she is no longer the host in the traditional sense, and she no longer puts on airs and talks empty words, but completely presents her true self." There was a mistake in the process of hosting: Guan Jinpeng, the award-winning guest, was introduced, but Wu Shixian came out. Cheng Qingsong explained that it was the director’s failure to inform Ni Ping in time that caused the mistake.　　

　　　　Quotations from Ni Ping

　　　　Lu zhuguo　

　　　　"I wish you never get Alzheimer’s disease."

　　　　Zhang Ruifang　　

　　　　"Do you know what fans mean?"

　　　　Zhu Yuanyuan　　

　　　　"Zhu Yuanyuan is a bit like a simpleton."

　　　　Li Shaohong (Nianping Zeng’s wife)　　

　　　　"Nianping can’t walk. I was going to take my left leg, but I still took my right leg."

　　　　"Those who receive the prize are not allowed to speak."　　

Editor: Li Dan

　　　 It is almost impossible to tell the difference between China Telecom and China Unicom, at least from the product packaging. The only way is to compare the back of the two versions of the packaging box to see which one is Telecom and the other is China Unicom. In fact, this also shows from another aspect that the two versions of iPhone 4S only have different network standards, and their own hardware configurations are exactly the same, corresponding to mobile phone users in GSM and CDMA networks respectively.

A comprehensive comparison between China Telecom and China Unicom iPhone 4S

　　　 The model of standard telecom iPhone 4S is A1387, which is consistent with the international version of iPhone 4S, while the model of standard Unicom iPhone 4S is. Up to now, there is still no official explanation to explain the difference, but the signal problem of WCDMA bare-metal iPhone 4S using mobile cards has basically come to an end with the official release of iOS5.1. At least the signal blind area that I once thought is now completely no problem.

Telecom & Unicom iPhone 4S boxes are marked with different models.

　　　 As for accessories, Unicom and the telecom version of iPhone 4S also presented microUSB adapters in addition to direct charging plugs, 30pin data cables, wire-controlled headphones and micro-SIM card slot pins. Compared with the international version, both versions of the licensed products have all given such an adapter, which is still very gratifying.

Telecom & Unicom iPhone 4S accessories are exactly the same.

The only difference between Telecom and Unicom iPhone 4S fuselage

　　　 Whether it’s China Telecom or China Unicom’s iPhone 4S, there is no difference in the body of the mobile phone, except, of course, the "cdma2000 digital machine" logo on the back of the telecom version. The cell phone signal column shows "China Unicom" which is different from "China Telecom", but it also shows "3G" after cellular data is turned on.

　　　 Many people are saying that the telecom signal is good and the Unicom signal is poor. To be honest, from the author’s personal experience, there are indeed many signal blind spots in the use of Unicom 4 and Unicom in Beijing’s Fourth Ring Road, especially in office buildings, bathrooms, elevators and relatively remote open places, which are directly "no service", but most of the time it is acceptable. So we had the idea that we wanted to test whether telecommunications could be plugged into China Unicom and mobile cards, but it turned out that it was not possible.

Telecom & Unicom iPhone 4S signal bar display

Telecom Unlocking Interface/Drop-down Menu

Telecommunication setup

　　　 Although the two versions belong to different networks, the system version is the latest iOS5.1. So under the same system, are there differences in specific settings? The answer is yes.

Telecom 4S cancels the choice of "operator"

　　　 In fact, this can’t be blamed on telecommunications. It’s hard to win this straw. No one would want to make a wedding dress for others. As a result, Telecom canceled the "Operator" option in the "Settings", and even when China Unicom or a mobile card was inserted, the option reappeared only in a flash.

Telecom adds "roaming" function

　　　 We all know that in iOS5.1, the "Enable 3G" switch cancelled in 5.0.1 has been re-added, perhaps because of the method of weighing signal and power consumption, and this option reappeared in version 5.1. However, in telecommunications, this switch does not appear, only the "cellular data" switch. However, if you gain something, you lose it. Telecom added the function of "roaming", echoing the text annotation of the product packaging box:This iPhone also supports UMTS/HSDPA/HSUPA and GSM/EDGE bands outside Chinese mainland..

　
Telecom cancels "3G enabled" and adds "roaming"

Telecom burned MEID code.

　　　 In telecom’s "Settings"-> "About", there is one more MEID code than Unicom.MEID is the only 56-bit mobile terminal identification number in the world. The identification number will be burned into the terminal and cannot be modified. It can be used to identify and track mobile devices. MEID is mainly distributed to CDMA mobile phones.. It seems that the telecom still burned the number and did not pass this trouble on to the users.

　
Telecom burning MEID code

　　　 We choose the free test Speedtest in App Store to test the upload speed of China Telecom and China Unicom 4S in CDMA2000 and WCDMA networks respectively. Unfortunately, the mobile EDGE network can’t be tested smoothly, and it can’t pass in the first ping stage.

　
Comparison of network speed test between China Telecom and China Unicom (left: China Telecom/right: China Unicom)

　　　 According to the test results, the EVDO network of China Telecom is slower than China Unicom in the ping stage. In terms of download speed, China Unicom beat China Telecom’s 0.81Mbps； with 2.02Mbps. In terms of upload speed, Telecom’s 0.20Mbps won Unicom’s 0.10Mbps with a slight advantage.

　
Comparison of network speed test between China Telecom and China Unicom (left: China Telecom/right: China Unicom)

　
Comparison of network speed test between China Telecom and China Unicom (left: China Telecom/right: China Unicom)

　　　 Of course, such a test is influenced by many factors, such as the test environment, network environment, itself and so on. At least in terms of servers, the conditions of the two tested mobile phones are the same (both are changchun, Hosted by：China Unicom), and the test results can actually show the respective advantages of China Unicom and the network.

　　　 Since the telecom 4S I got was an in-store display machine (not for sale), I decided to brush the official firmware of iOS5.1 myself. On the one hand, it can show the original face of telecommunications, and on the other hand, it wants to test that telecommunications can identify Unicom and mobile SIM cards.

Telecom iPhone 4S connection

Telecom manually brushes the official firmware of iOS5.1.

Telecom successfully refreshed iOS5.1.

　　　 The process of brushing the phone is not complicated. After restarting, we can see the familiar activation interface again. At this time, whether you choose Wi-Fi or iTunes, you can activate it smoothly, but the brushed telecom will no longer have additional data such as demonstration videos built in.　

ITunes activation failed when telecom inserted Unicom card.

ITunes activation of telecom insertion mobile card failed.

　　　 Next, we test the identification of Unicom and mobile cards, and the situation is better than before. After inserting the non-telecom SIM card, the "operator" option will disappear in the system "Settings", but it is still a flash in the pan. Surprisingly, the refreshed telecom can correctly identify "China Unicom 3G" and "China Mobile".

　
Telecom’s "operator" option is short-lived.

　
Telecom can briefly identify Unicom 3G and mobile GSM networks after refreshing iOS5.1.

　　　 However, the good times did not last long. After the signal bar flashed the non-"China Telecom" logo in a hurry, the system entered the "Activation Required" interface. At this time, if it is a China Unicom SIM card, it will prompt that only compatible SIM cards provided by supported operators can be used to activate the iPhone；; If it is a SIM card of China Mobile, it will be prompted: Your connected iPhone may be damaged and cannot be activated.

　
Telecom is plugged into Unicom and the mobile card needs to be reactivated.

　
Telecom inserted into Unicom and Wi-Fi activation of telecom card failed (left: Unicom/right: Mobile)

　　　 From this, it can be inferred that the hardware level of telecom supports GSM, WCDMA and CDMA2000, but the customized version of telecom should add a network judgment program at the level, so that the above-mentioned "flash-by-flash" test results will appear.

　　　 Telecom 4S, China Unicom, and bare metal, no matter who owns it, as long as it is, all have back-illuminated CMOS sensors and 3.5-inch Retina displays, so there is no need to compare photos, and the effect is still excellent.

　
Telecom supports HDR photography and simple photo editing.

Telecom real shot proof

Telecom real shot proof

Telecom real shot proof

Telecom real shot proof

Telecom real shot proof (HDR off)

Telecom real shot proof (HDR turned on)

Telecom real shot proof

Telecom real shot proof

　　　 For 16GB Telecom and Unicom 4S, let’s calculate the following two accounts:

　　　 1. If the minimum package is promised, how much will it cost for Unicom and Telecom to sign the contract for two years?

　　　 2. If you want to buy a machine in 0 yuan, and promise to access the network for two years, how much does it cost for China Telecom and China Unicom?

　　　 First, let’s calculate the first account. The first is telecommunications. The minimum package threshold is 24 months’ monthly phone bill in 49 yuan. The preferential purchase price is 4,499 yuan, and the prepaid phone bill is 1,281 yuan. It will be returned to 53 yuan in the first 23 months and returned to 62 yuan in the last month, that is, you need to spend 4,499 yuan to buy a telecom, and the prepaid phone bill is 1,281 yuan. Since the amount returned in 24 months is above the promised 49 yuan package (the difference between 4 yuan and 13 yuan), there is no need to pay more. Of course, the premise is that you can’t exceed the limit of call duration and Internet traffic per month.

　　　 Let’s take a look at Unicom. It is also a 24-month contract, with a preferential purchase price of 3,999 yuan, a prepaid phone bill of 1,881 yuan, and an equal amount of 78 yuan will be returned monthly, but 78 yuan’s x24 months = 1,872 yuan < the prepaid deposit of 1,881 yuan (the difference is 9 yuan). However, it should be noted that Unicom’s entry package is 66 yuan per month, which is also lower than the amount returned by month (the difference is 12 yuan).

Comparison of China Telecom & China Unicom iPhone 4S Entry Package (2 years online, 16GB version)

　　　 To sum up, in this link, China Unicom’s minimum 2-year package for iPhone 4S is 5,880 yuan, which is more expensive than the minimum package for China Telecom by 10 yuan. The monthly return amount of both packages is above the package, which means that if it does not exceed the amount in the package, there is no need to spend extra money. Now you can refer to the specific contents of these two packages, and personally think that Unicom has more advantages.

　　　 Then there is the second account. Let’s look at telecom first. The minimum commitment package for purchasing a machine in 0 yuan for two years is 389 yuan. At this time, the prepaid phone bill is 5,780 yuan, which will be returned to 240 yuan in the first three months and 260 yuan in the last month. In other words, users need to pay 389 yuan -240 yuan =149 yuan, 24 months is 149 yuan x23 months+129 yuan (389 yuan -260 yuan) of the difference of the last month, totaling 3556 yuan.The actual minimum consumption of telecom in the network for two years is 5780 yuan +3556 yuan =9336 yuan..

Comparison of Telecom & China Unicom’s "0 yuan Purchase" Package (2 years in the network, 16GB version)

　　　 The situation of China Unicom is that the minimum threshold for accessing the network for two years is the promised monthly consumption of 386 yuan, and the total purchase price is still 5880 yuan. 245 yuan will be returned in 24 months, that is, the difference will be 141 yuan (386 yuan -245 yuan) every month.Unicom needs to pay the difference of telephone charges of 141 yuan × 24 months = 3,384 yuan, plus the deposit of 5,880 yuan, totaling 9,264 yuan.. So what is the specific content of the package at this time? On the whole, I personally think that China Unicom is dominant.

　　　 Finally, to sum up, the changes and advantages and disadvantages of Telecom 4S:

Telecom (left) & Unicom iPhone 4S (right)

　　　 1. The hardware supports GSM/WCDMA/CDMA2000, but it is soft shielded to only support CDMA2000.

　　　 2. The "Operator" option is cancelled in the "Settings" of the telecom iPhone 4S, and there is no "3G enabled" switch, but "roaming" is supported.

　　　 3. in the "settings"-> "about" of telecom iPhone 4S, the MEID code is added.

　　　 4. Telecom’s speed of using 3G network is not as fast as Unicom’s, but its upload speed is slightly better than Unicom’s.

　　　 5. Compared with the 0 yuan purchase package, the two-year contract 16GB telecom entry package has almost no advantage, but the total purchase price is not much different from the actual minimum consumption during the contract period.

16GB Telecom 4S "Deposit and Call Delivery" Contract

32GB Telecom’s "Save Call Charge to Send Mobile Phone" Contract

64GB Telecom’s "Save Call Charge to Send Mobile Phone" Contract

Telecom "Buy Mobile Phone to Send Call Charge" Contract

Details of Telecom’s Contract Package of "Saving Phone Charge to Send Mobile Phone"

16GB Unicom 4S "Deposit and Call Delivery" Contract

32GB Unicom’s "Save Call Charge to Send Mobile Phone" Contract

64GB Unicom’s "Save Call Charge to Send Mobile Phone" Contract

16GB Unicom’s Contract of "Purchasing Mobile Phone to Send Phone Charge to Network"

32GB Unicom’s Contract of "Purchasing Mobile Phone to Send Call Charge to Network"

64GB Unicom’s Contract of "Buying Mobile Phone and Sending Phone Charge to Network"

Xinhua News Agency, Taiyuan, September 3rd Title: China’s Wisdom and China’s Opportunity for Low-carbon Energy Development —— On-the-spot observation from Taiyuan Forum in 2022.

Xinhua news agency reporter

Discuss the low-carbon transformation of energy and seek practical cooperation in energy. From September 1st to 3rd, 2022 Taiyuan Energy Low Carbon Development Forum (referred to as "Taiyuan Forum") was held in Taiyuan, Shanxi.

Since the 18th National Congress of the Communist Party of China, the General Secretary of the Supreme Leader has put forward a new energy security strategy of "four revolutions and one cooperation", guiding China to promote the energy consumption revolution, energy supply revolution, energy technology revolution and energy system revolution, strengthening international cooperation in all directions, making efforts to build a clean, low-carbon, safe and efficient energy system, and promoting the improvement of the global energy governance system.

As an important window to observe China’s low-carbon energy development, the new technologies, industries and occupations displayed by Taiyuan Forum are refreshing, and the field of low-carbon development is full of vitality and strong kinetic energy.

This is the opening ceremony of Taiyuan Energy Low-carbon Development Forum in 2022, which was filmed on September 1st. Xinhua news agency

Ensuring energy security and promoting energy revolution with the goal of "double carbon"

A model of pumped storage power station is composed of photovoltaic panels all over the mountains, wind power stations standing one after another, a surface reservoir and an abandoned mine. At the 2022 China (Taiyuan) International Energy Industry Expo held during the forum, this project, which combines traditional coal mines with green power, attracted many viewers’ attention.

"Using the roadway of the closed mine and the accumulated mine water in Taiyuan Dongshan Coal Mine to form the’ underground reservoir’ of the pumped storage power station can not only reduce investment, but also promote the consumption of new energy in the surrounding areas." Wang Pengjie, director of China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. said.

On September 3rd, at 2022 China (Taiyuan) International Energy Industry Expo, the staff of China Huaneng Group Co., Ltd. introduced its green hydrogen industry system to visitors. Xinhua News Agency reporter Yang Chenguang photo

Pumped storage in abandoned mines, hydrogen production from electrolyzed water, carbon dioxide capture devices, green mining in coal mines … The words green, energy saving and carbon reduction can be seen everywhere at forums and exhibitions, which has become the epitome of China’s deepening energy revolution and actively and steadily promoting the goal of carbon neutrality in peak carbon dioxide emissions.

According to the data from the National Development and Reform Commission and the National Energy Administration, since 2012, China’s energy consumption intensity has decreased by more than 26%, the proportion of coal in energy consumption has decreased by 12.5 percentage points, and the installed capacity of renewable energy power generation has exceeded 1.1 billion kilowatts. The installed capacity of hydropower, wind power and photovoltaic power generation has ranked first in the world for many years.

"As the largest developing country, China will complete the largest decline in carbon emission intensity in the world and move from the peak of carbon emission to carbon neutrality in the shortest time in history. This is not easy to achieve and requires hard work." Xie Zhenhua, China’s special envoy for climate change, said.

Based on the basic national conditions of being rich in coal but poor in oil and gas, it is an important task for China to promote high-quality energy development by promoting green and low-carbon transformation on the premise of ensuring energy security.

As a pilot project of comprehensive reform of the national energy revolution, Shanxi seized the strategic opportunity and accelerated the adjustment of industrial structure and energy structure. At present, the advanced coal production capacity in the province accounts for 79.4%, all coal-fired generating units in service have achieved ultra-low emissions, and the total installed capacity of wind power and photovoltaic has reached 31.8%. Breakthroughs in cutting-edge technologies such as hydrogen energy, sodium ion batteries, smart mines and energy Internet have been accelerated.

The main person in charge of the Shanxi Provincial Party Committee said at the forum that based on the present and facing the future, Shanxi will take the "five integrations" of coal and coal power, coal power and new energy, coal and coal chemical industry, coal industry and digital technology, coal industry and carbon reduction technology as the main direction, and strive to embark on a green and low-carbon development road with Shanxi characteristics.

On September 2nd, exhibitors experienced the VR safety experience system of coal mine accidents and disasters at 2022 China (Taiyuan) International Energy Industry Expo. Xinhua News Agency reporter Yang Chenguang photo

Low-carbon transformation of new technologies, new industries and new occupations has spawned more opportunities.

Achieving peak carbon dioxide emissions and carbon neutrality is an extensive and profound systematic economic and social change. Participants believe that this is not only a huge challenge, but also a valuable development opportunity.

-New technology accelerates iteration. At this forum, a new energy vehicle attracted public attention. In the past three months, this "Longji Green Energy" exhibition car, which is full of photovoltaic sophisticated scientific and technological achievements and solutions, has crossed many cities in China from south to north.

Yao Feng, vice president of Longji Green Energy Technology Co., Ltd. in China, said that Longji Green Energy broke through the conversion efficiency of photovoltaic single crystal cells for 10 times in a year and became the world record holder of the conversion efficiency of photovoltaic single crystal cells.

"’Double Carbon’ is pushing global science and technology to accelerate innovation." Qian Zhimin, chairman of the State Power Investment Group, said that the current integration and innovation of energy, digitalization and intelligence has made it possible for China to develop rapidly in energy-related science and technology fields.

-New industries developed rapidly. Not long ago, Shanxi Xiangrui Energy Co., Ltd. officially unveiled the electric carbon fusion laboratory established by a number of institutions, trying to link the electricity market with the carbon market and provide data analysis services for market participants. This four-year-old enterprise has seized the opportunity of low-carbon development and quickly laid out low-carbon cloud accounts, virtual power plants and other businesses, and has become one of the leading enterprises in dual-carbon services in Shanxi Province.

Huang Di, director of the Microgrid Division of Zhejiang Oupeng Technology Co., Ltd., said that he came to Shanxi for the first time to participate in the exhibition, and his fancy was the emphasis on low-carbon transportation in various places. The scale effect of new energy commercial vehicles will bring development opportunities for the power exchange model.

"Forestry will be promising in the new round of energy revolution, and bio-based materials, biomass materials and carbon reduction and carbon fixation technologies will usher in the spring of development." Yu Honghui, chairman of China Forestry Group, said that the role and status of forest carbon sinks will become increasingly prominent in the future.

-New occupations are constantly emerging. Rong Shujie from Shanxi Hepo Power Generation Co., Ltd. is an electricity trader. As a "trader", she undertakes important tasks such as daily trading declaration, contract decomposition, settlement management and information disclosure of power plants. In July this year, power traders, carbon emission managers, carbon sink appraisers, and building energy conservation and emission reduction consultants were included in the newly revised People’s Republic of China (PRC) Occupational Classification Ceremony (2022 Edition).

"The energy transformation that will limit the global temperature rise to 1.5℃ higher than the pre-industrial level by 2050 is expected to create more than 120 million jobs in the global energy industry." UN Assistant Secretary-General Navid Hanif said.

On September 2nd, Chinese and foreign exhibitors exchanged ideas at the 2022 China (Taiyuan) International Energy Industry Expo. Xinhua News Agency reporter Yang Chenguang photo

Expand energy transformation cooperation in all directions.

"Since investing in the construction and operation of the first batch of wind power projects in 2012, Gemeng International Energy Co., Ltd. has put 2.2 million kilowatts of wind power and photovoltaic power generation projects into operation and under construction, and will strive to reach 10 million kilowatts by the end of 2025." Cao Yang, chairman of the company, said that as a large-scale joint-venture energy group, Gemeng International has attracted partners from South Korea, Japan and other countries to jointly promote the transformation of traditional energy.

On September 3rd, at the 2022 China (Taiyuan) International Energy Industry Expo, exhibitors exchanged ideas in the exhibition hall of Gemeng International Energy Co., Ltd. Xinhua News Agency reporter Yang Chenguang photo

China’s energy transformation has provided new development opportunities for the world. "Our factories are located in more than 10 cities in China, and we have set up innovation centers in 4 cities." Ke Weimao, president and global chief operating officer of Honeywell, said that Honeywell has established contacts with many China enterprises to help their products become smarter and safer.

Iceland’s Prime Minister Katerina Jakob Sdottir said that the energy cooperation between China and Iceland was initiated more than 40 years ago, and the cooperation in the field of geothermal energy has expanded from the enterprise level to the fields of education and technology transfer.

Not only bring in, but also go out. The travel cost per kilometer of a car is only in 0.3 yuan, which can reduce the carbon emission by 0.8 tons every 10,000 kilometers, and the fuel cost of a heavy truck is about 1 yuan compared with that of a traditional diesel vehicle … Geely methanol hybrid car and methanol heavy truck were delivered in Jinzhong City, Shanxi Province a few days ago. Relying on mature methanol technology, methanol vehicles have gone to Iceland, Denmark and other countries.

This is a clean energy car that was shot at the 2022 China (Taiyuan) International Energy Industry Expo on September 1st. Xinhua News Agency reporter Yang Chenguang photo

In March this year, the methanol car and long-distance methanol heavy truck developed and produced by China Zhejiang Geely Holding Group started the test and demonstration operation in aalborg Port. "I think it is very important to have strong cooperation in this field. This is not only about ourselves, but also about the well-being of future generations. " Trina Bramsen, Danish Minister of Transport, said.

"I welcome China’s global leadership in the field of renewable energy investment, and express my appreciation for China’s grand development plan put forward in the 14 th Five-Year Plan." UN Assistant Secretary-General Navid Hanif said. (Reporter Zhao Donghui, Chai Hailiang, Liang Xiaofei, Wang Jinyu)

　　The Beijing Municipal Center for Disease Control and Prevention recently issued the Guidelines on Key Prevention and Control Measures that the public should always adhere to, suggesting that people should always wear masks, keep social distance, maintain hand hygiene, cooperate with health monitoring, do a good job in food hygiene, and do a good job in daily cleaning and disinfection.

　　Wang Peng issued by Xinhua News Agency

　　Summer has arrived, and the epidemic in COVID-19 is still raging.

　　According to Yu Xuejie, dean of the School of Health of Wuhan University and an infectious disease expert, at present, it is summer in the northern hemisphere and winter in the southern hemisphere. However, Covid-19 is not afraid of cold and heat, and it continues to spread all over the world. Some experts believe that Covid-19 may not be completely eliminated in a few years, and people must accept the fact that it will exist for a long time. Especially with the resumption of work, the return of a large number of people and students, the increase of traveling residents, and the risk of importing cases, the epidemic prevention and control work is still arduous and arduous.

　　High temperature and epidemic prevention pressure

　　The World Health Organization (WHO) and the World Meteorological Organization (WMO) held an expert video conference not long ago, pointing out that the superposition of COVID-19 epidemic and the adverse health effects of this summer’s heat wave will bring new challenges to epidemic prevention and control and public health safety, reminding countries to attach great importance to it and do a good job in coping with the heat wave under this year’s epidemic.

　　There have been some speculations that the high temperature in summer may delay the spread of Covid-19. However, WHO said that the latest research did not find that meteorological factors such as temperature, humidity and ultraviolet radiation were significantly related to the spread of Covid-19. Therefore, experts pointed out that even if the hot summer comes, people should still be highly vigilant against Covid-19, especially in the hot and humid environment, the risk of transmission of Covid-19 still exists, and it is necessary to seriously abide by various prevention and control measures. At the same time, the World Meteorological Organization warned that although the influence of high temperature on the spread of Covid-19 is not obvious, the heat wave will cause other damages to human health and health system.

　　Countdown to The Lancet 2030 reports that people in all parts of the world are extremely vulnerable to extreme high temperatures. High temperature, high humidity and strong radiation weather can cause a series of physiological function changes in human body temperature regulation, water and salt metabolism, circulatory system, nervous system and urinary system. Once the body can’t adapt, it will cause abnormal temperature rise and lead to heatstroke. At the same time, extreme high temperature will also worsen chronic diseases such as cardiovascular and cerebrovascular diseases, respiratory diseases and diabetes, and increase the number of deaths.

　　A Guide to Epidemic Prevention in Hot Weather edited by the World Meteorological Organization says that all diseases and deaths related to hot weather can be prevented, and full preparations should be made according to the actual situation in COVID-19.

　　Should I wear a mask?

　　As a "protective standard" when going out, people have gradually become accustomed to its existence. However, as the weather gets hotter and the ultraviolet rays strengthen, the sultry feeling of wearing a mask and some skin problems become more and more prominent. Therefore, how to do personal protection in hot summer has become a problem for many people.

　　It is undeniable that wearing a mask is an effective way to block the spread of Covid-19. However, in a hot environment, does wearing a mask increase the risk of heatstroke?

　　Disease control experts pointed out that it is necessary to adhere to the scientific wearing of masks and develop a good habit of carrying masks with you. Regarding whether or not to wear masks, low-risk areas should wear masks according to the Guidelines for Wearing Masks for Public Science (Revised Edition) issued by National Health Commission.

　　Wang Chen, an academician of China Academy of Engineering and dean of China Academy of Medical Sciences, said that wearing a mask should be judged according to different situations, and it is not necessary to wear a mask in an open, ventilated and sparsely populated place; Wear masks when taking public transportation (cars, trains, planes, ships, etc.), going to closed spaces such as shopping malls, vegetable markets, office buildings, and going to hospitals; If you are not sure whether you should wear a mask when you go out, you can always keep a mask with you so that you can wear it when you should. In addition, for some key people, such as doctors, staff in closed places, patients with chronic diseases, the elderly, etc., masks should be worn in public places; People with respiratory symptoms should take the initiative to wear masks.

　　Scientific use of air conditioning

　　When the heat wave strikes, it is inevitable to use air conditioning. If you are too worried about the spread of Covid-19 and don’t use air conditioning, it will lead to health hazards such as heatstroke, but excessive use of air conditioning will also lead to the decline of human immunity and make you more susceptible to diseases.

　　In this regard, experts said that people who use household air conditioners need to disinfect the air conditioners, and it is not advisable to keep the indoor temperature below 26 degrees Celsius, and pay attention to opening windows frequently for ventilation; Public places and offices that use central air-conditioning and ventilation systems should also use central air-conditioning and ventilation systems safely, and take various measures to prevent and control epidemic situations in public places.

　　When using central air conditioning, it is required to turn off the return air and run with fresh air, and the air between rooms is required to be independent, and the fresh air should be opened as much as possible. If there is a disinfection device or purification device, the central air conditioner should be turned on during the epidemic period, and the filters at the air outlet and return air outlet should be cleaned every week.

　　Experts pointed out that it is necessary to keep indoor air circulation and standardize the use of air conditioners to avoid air pollution. Air conditioning and fresh air system are two independent indoor systems, one for adjusting temperature and the other for improving indoor air quality. The central air conditioner should be able to release enough fresh air and ensure independent return air or no return air. If the central air conditioner in the indoor place cannot meet the above standards, the central air conditioner should be turned off, and the independent single air conditioner can be used. If it is not clear whether there are infected people in the people covered by central air conditioning, then everyone should wear a mask (indoors) until the risk is reduced.

　　Can mosquitoes spread viruses?

　　As the weather gets hotter and hotter, there are more mosquitoes. Many people are worried about whether Covid-19 will be spread by mosquitoes.

　　Lin Minggui, Executive Director of Infectious Diseases Department of Tsinghua Chang Gung Hospital, pointed out that mosquito bites can indeed infect many diseases, but there is no evidence that Covid-19 can be spread by mosquitoes at present, so the public need not panic. But in any case, keeping the family and the surrounding environment clean and reducing the appearance of mosquitoes can not be ignored.

　　"Malaria, dengue fever, Japanese encephalitis, filariasis, etc. can all be spread by mosquitoes." Lin Minggui said that when summer comes, we should take active actions to comprehensively and scientifically prevent and control mosquito hazards. For example, vases and aquatic plants at home should be changed frequently, at least once a week, and the accumulated water in the bottom plates or trays of flowerpots should be kept clean. We should pay special attention to the places with water in dark corners and clean up the air-conditioned trays, bathrooms and kitchen floor drains in time. Besides, many people think there are no mosquitoes during the day, so there is no need to be afraid. Lin Minggui said that mosquitoes are not all from Nocturnal Animals, so it is also necessary to prevent mosquitoes during the day, especially when going out to places with more plants and water.

　　Pay attention to susceptible people

　　The elderly over 65 years old are susceptible to Covid-19 and heat wave, and the mortality rate of Covid-19 infection and the risk of heatstroke will increase with age. In addition, people suffering from chronic basic diseases such as cardiovascular diseases, lung diseases, kidney diseases, diabetes, obesity, outdoor workers, medical workers and social service providers, pregnant women, etc., especially need to be protected.

　　Public health experts suggest that the public should try to avoid going out during the heat wave, work outdoors in the shade as much as possible and pay attention to replenish water in time; Pay attention to keep the living and working environment cool; Ensure effective contact with susceptible people who are isolated or living alone, and provide timely assistance in case of heatstroke reaction; Ensure that medical workers and social service personnel wearing protective devices are in a cool working environment.