标签： 上海后花园阿拉网

　　It’s spring tea season again. The problem of pesticide residues in tea can be said to have never stopped, and there will be some very eye-catching posts from time to time. Let’s talk about whether the problem of pesticide residues in tea is serious today. Is drinking tea really equal to drinking pesticides?

　　Why do you want to use pesticides in tea?

　　Tea is widely loved because of its natural and healthy properties, and even a necessary drink for many people every day. Tea drinkers naturally hope that the tea they drink is green and pollution-free, without pesticides or other harmful substances, but this is unrealistic.

　　Tea trees usually grow in a warm and humid environment, which is prone to pests and diseases, and the use of pesticides is inevitable in the process of large-scale planting. According to statistics, there are dozens of pesticides used on tea trees or tea leaves at present, mainly pesticides and herbicides.

　　What pesticides are mainly used in tea?

　　China began to use pesticides in tea production in the early 1950s, with a history of more than 60 years. In the first 20 years, DDT and HCH were mainly used in tea, so the level of pesticide residues in tea at that stage was the highest.

　　Later, people gradually realized that these pesticides would remain in the environment for a long time and would not be degraded, so that they could be found in almost every corner of the earth, which brought lasting pain to our living environment, so countries banned their production and use one after another.

　　With the development of society, more and more pesticides with high residue or high toxicity have been eliminated and replaced by some pesticides with high efficiency and low toxicity. Tea is no exception. The Food Safety Law of People’s Republic of China (PRC) stipulates that it is forbidden to use highly toxic and highly toxic pesticides in crops such as vegetables, fruits, tea and Chinese herbal medicines.

　　Is the pesticide residue on tea harmful?

　　Since pesticides are applied to tea, there will inevitably be some residues, but there are two different things: pesticide residues and pesticide residues exceeding the standard.

　　All the pesticides allowed to be used in tea by the state are low toxic pesticides, and the Maximum Pesticide Residue Limit in Food of National Standard for Food Safety (GB2763-2016) stipulates the limit requirements of 48 pesticides in tea. These limit values are obtained according to scientific risk assessment. As long as the pesticide residue in tea does not exceed the standard, it is safe for consumers.

　　Moreover, most of the fat-soluble pesticides used in tea are pyrethroids, and the amount that can be leached into tea is very limited in the process of making tea.

　　In short, having pesticide residues does not mean harm. The human body is not so "incompetent", it can metabolize a small amount of pesticides or other harmful substances that enter the body, or it is a cliche: it is hooliganism to talk about toxicity without dosage! Not only tea, but also pesticide residues in other agricultural products.

　　How to reduce pesticide residues in tea?

　　Although the pesticide residues in qualified tea that meet the standards are safe for consumers’ health, everyone definitely wants to consume as little pesticides as possible. In order to reduce pesticide residues in tea, we can start from the following aspects:

　　1. Tea farmers use pesticide varieties with low residue and easy degradation in accordance with state regulations, and strictly control the usage.

　　2. Ensure the safe interval of tea picking. As a kind of plant, tea itself has a certain metabolic ability to pesticides. Picking tea after spraying pesticides for a period of time (ranging from 7 to 15 days) can significantly reduce the residual pesticides in tea.

　　3. Using ecological control measures to control pests and reduce the use of pesticides will also greatly reduce pesticide residues in tea.

　　Consumers should buy tea produced by regular manufacturers.

　　Text/Dr. Wang Xiaodan

1905 movie network news On January 9th, the Spring Festival movie starring, directed by and starring Deng Chao,,,,,, and so on released a special training program for actors, showing the crazy "involution" training performed by the whole crew in pursuit of being more suitable for table tennis players. Eight months of technical training before shooting, and the "battle for the table" all the time between shooting, let the actors realize the transformation from "zero foundation" to the affirmation of the prototype. During filming, Cai Zhenhua, Ma Wenge, Ding Song, Kong Linghui and other prototypes who were present to watch all gave good comments on the training achievements of actors, which added a solid and reliable reason for the film to see during the Spring Festival.

"Rookie" is going to play table tennis player? After more than eight months of training, the whole group practiced the ball "in-roll"

On January 9th, the film "China Ping-Pong’s Jedi Counter-Strike" released a special feature of actor training, which showed the behind-the-scenes training process of the whole group of actors who were striving for perfection and sweating profusely. At the beginning of the creation, the two directors made it clear that they should use professional actors instead of athletes to interpret their roles: "Because actors have stronger ability to express their emotions, but at the same time their problem is that they have no foundation in playing ball." It is not easy for an actor to really play a good table tennis player. Even the prototype Cai Zhenhua admits: "It must be very difficult for an actor to play a professional table tennis player." Playing table tennis players is full of challenges, not to mention that all the actors who just joined the group are "table tennis whites". What should we do? Practice hard!

According to Cai Zhenhua, "table tennis is a very delicate technique. It is not just an action. Every cricket is in place." Technical control is the key to the pursuit of perfect performance. For this reason, the crew invited many top table tennis directors and athletes in China to train the prototype technical essentials for the actors, and made training plans every day to pay close attention to the details of the movements. Ma Wenge, one of the prototypes, personally took the technical guidance of the film table tennis and took charge of the control. Director Yu Baimei revealed: "We have a special table tennis instructor, and we will tell the actors accurately every day that the ball is a twist and what the rotation of the ball should be." Actor Ding Guansen also said: "In addition to practicing some basic skills and basic movements, actors should also make your movements look like prototypes and train to play with the starting point of the prototype."

In addition to overcoming technical problems, a lot of training is indispensable. As early as before the film started shooting, the director organized the actors to carry out table tennis training for eight months, and even practiced in the crew to start the "devil involution." Yu Baimei also said: "Later, it became more and more fierce, and finally it became an’ enemy’. Why? Because every day you hold back to surpass others. For example, Ding Guansen and Sun Jilun couldn’t beat others at first. During the training competition, they were no match for others and were very bullied. Then two people practice by themselves, even feeling that it is not for our film, but for personal honor! The’ Five Tigers’ will begin to roll in after practicing for a while by themselves every day. In addition to technology, actors also began to study new equipment, because different equipment brings different effects, which is very fascinating and interesting. "

For the obsession and love of table tennis! The actor was greatly affirmed by prototypes such as Cai Zhenhua and Kong Linghui.

"Only those who really have obsession and love for table tennis can do things related to table tennis well!" From taking on a strange role to getting in touch with the prototype, understanding their stories and getting familiar with their ways of playing, and finally forming a cohesive group, the actors are also inspired to have a real love for table tennis in this process. Timmy Xu said: "If you really like to do something, you will definitely do it well." Duan Bowen and Cai Yida both said, "Why do we train so hard? Because of love. "

The actors’ earnest and unambiguous training attitude, and their striving for perfection have interpreted the self-requirements of table tennis players, and won the support and praise of many film prototypes. Cai Zhenhua affirmed: "The performance in the plot is very good, and it is very difficult to play this part." Wang Tao, who watched the film in advance, especially praised Duan Bowen, who plays himself: "He can find the expression and eyes I have on the court." Ding Song also praised the actors: "It’s already very similar, ok." Kong Linghui even expressed surprise: "Those actors play ball much better than I expected!" Ma Wenge, as the technical director of table tennis in this film, also "highly affirmed" Timmy Xu: "It’s a bit what I meant then."

When Deng Chao recalled the encouragement of the prototypes, he was also deeply moved: "Our prototypes went to the scene to visit the class. They were very shocked to see the actors playing ball, as if they had crossed." Yu Baimei also said, "I hope that after this movie is made, some people will like table tennis because of this movie." Table tennis, as a national sport, has become a brand of the times for generations of people, and the movie "China Table Tennis Fight Back" has also become the most suitable movie for the whole family to watch together during the Spring Festival. This tortuous and brilliant story in the film is destined to bring more encouragement to the audience in the new year!

The film "China Ping-Pong’s Jedi Fight Back" is based on the real history, directed by Deng Chao and Yu Baimei, and starring Deng Chao, Sun Li, Timmy Xu, Duan Bowen, Cai Yida, Ding Guansen, Sun Jilun and Aruna. The film will be released nationwide on the first day of New Year’s Day in 2023, so stay tuned.