Students attend a live class given by the Shenzhou-13 crew members, at the China Science and Technology Museum in Beijing, capital of China, Dec. 9, 2021. The first live class from China's space station was held on Thursday afternoon, given by Shenzhou-13 crew members Zhai Zhigang, Wang Yaping and Ye Guangfu to students on Earth. (Xinhua/Jin Liwang)