Many actions have been taken to fight food waste. 【小题1】 Liu Jichen, 23, a student from Tsinghua University, users can open the mini-program and take a picture of their empty plates. Once the picture is recognized（辨认）by the AI, students can collect points and use them to buy gifts. 【小题2】

The team also started a campaign called “Clear Your Plate” in Chinese universities in 2018. It has attracted over 1,017 universities across the country. Students compete against each other to see who can get those most points in Clear Plate. Now in its third year, the one-month campaign has reached 1,017 schools.

【小题3】 In 2017, he found that the restaurant would give diners who finished off their food a card and offer small gifts after a certain number of cards had been collected.

“Progress in technology is good to cut down food waste,” Liu thought. He organized a team of 20 members to work on the project at the end of 2017. Now, they have already taught their AI how to recognize empty plates. 【小题4】

“There were so many unknowns in research and development. For our team members, the biggest challenge was whether we were confident enough to complete it,” Liu said. They not only achieved their goal, the mini-program has more than 5 million users.

Thanks to his work, Liu was chosen as one of the United Nations’ 2020 Class of Young Leaders for the Sustainable Development Goals. “【小题5】 Meanwhile, our efforts can contribute Chinese wisdom and solutions to global food security challenges.” he added.

Sunday Sept. 6, 2020 sunny

As the saying goes, “Helping others is helping ourselves.” Everyone needs help some time in life.

Today our head teacher Ms. Li led us to do some volunteer work in our school. She also led us to the City Park and the Children’s Hospital. It was my first time to be a volunteer. I was shy at first. Little by little, I became excited about helping others. I cleaned the benches and picked up litter in the City Park. At that time, I found people smiling at me. In the Children’s Hospital, I told some stories and jokes which made the children feel happy. At the end of the day, I felt quite tired but happy. If I have a chance to be a volunteer after I graduate from college, I would like to go to the countryside to teach children. I hope that I could do something for them.

Volunteering is a great job. It can not only help others but also bring us happiness and improve ourselves. Although it may be a small thing, it can also make a great difference to the world. So take action and be helpful.