247 graduate students of Fudan University have volunteered to teach the children in Xihaigu region（地区）of Ningxia for the past 22 years. The region used to be poor because of its terrible natural environment. "We expect to make a difference to the children's life by sharing our knowledge in different fields, " one of the volunteers says.

The students have different abilities, so the volunteers have used different teaching methods to help them develop good study habits. "Local children had never learned English before, so we started with basic knowledge like English letters and pronunciation, " says Li Lianshuo, a Fudan volunteer. The volunteers help the students remember English words, read articles and deal with their study problems.

"We visit the students' homes in our free time. We communicate with their parents so that we help the parents understand the importance of children's education, because the parents didn't care much about it years ago, " explains Yang Chenhaotong, who was the leader of the volunteer team in 2019. According to Yang, the parents give their children a lot of support in their studies now.

The volunteers have helped the local children with their studies. They have also set up football clubs and held many ball games to make the children's life colorful. Fudan University has also given away more than 10 million yuan to the region to build playgrounds（操场）and other buildings over the past 22 years.

"Thanks to my volunteer teacher, my life has changed a lot. I will study hard and become an excellent person like her, " Li Sumei, a local student, says excitedly.

Students attend a science lesson given by astronauts on board China's Tiangong space station on Wednesday, March 23, 2022. Zhai Zhigang, Wang Yaping and Ye Guangfu, the members of the Shenzhou XIII, which was launched （发射） on October 16, appear on television screens watched by millions of students across China.

During the 41-minute lesson, the astronauts did four experiments to show physical phenomena (现象) only possible in a weightless environment, such as "liquid crystallization" and "a water bridge". In one experiment, Wang used a toy of Bing Dwen Dwen, the mascot of the 2022 Beijing Winter Olympic Games, to show how objects fly in Tiangong. They invited the young viewers to do similar experiments to see the differences between space and land environments.

Before closing the lesson, the astronauts answered questions from students. The questions covered the life and work in space, such as how to take care of the skin and whether hot water was available.

Wednesday's event marked the third time Wang had taken part in a space lesson. In June 2013, she gave the nation's first space lesson to over 60 million Chinese students in Shenzhou Ⅹ. It made China the second country, following the United States, to have given a lesson to schoolchildren from space.

In early December. Wang gave the country's second space lesson from the Tiangong station. The astronauts showed viewers how they lived and worked inside the space station.

"These science lessons can encourage students to explore the world of science and technology. " Shi Yi, a physics teacher, said after today's activity, '"Encouraged by China's spaceflight achievements, my school has built a space science laboratory and the teachers give lessons about space exploration. "