
Chinese astronauts Yang Liwei (3rd L rear), Jing Haipeng (2nd R rear) and Chen Dong (2nd L rear) interact with pupils at an exhibition on science and technology at Victoria Park, Hong Kong, south China, June 29, 2017. (Xinhua/Qin Qing)

Chinese astronauts Yang Liwei (3rd L rear), Jing Haipeng (2nd R rear) and Chen Dong (2nd L rear) interact with pupils at an exhibition on science and technology at Victoria Park, Hong Kong, south China, June 29, 2017. (Xinhua/Qin Qing)