Chinese astronauts Liu Yang (R) and Chen Dong attend a face-to-face interaction at Namibia's University of Science and Technology (NUST) in Windhoek, Namibia, on Aug. 22, 2019. Students at Namibia's University of Science and Technology (NUST) have called for more investments in science and technology following a visit by Chinese astronauts. (Photos: Xinhua)

Chinese astronauts Liu Yang (C) and Chen Dong (2nd L) attend a face-to-face interaction at Namibia's University of Science and Technology (NUST) in Windhoek, Namibia, on Aug. 22, 2019. Students at Namibia's University of Science and Technology (NUST) have called for more investments in science and technology following a visit by Chinese astronauts.

Chinese astronauts Liu Yang (3rd R) and Chen Dong (1st R) pose for a group photo with students at Namibia's University of Science and Technology (NUST) in Windhoek, Namibia, on Aug. 22, 2019. Students at Namibia's University of Science and Technology (NUST) have called for more investments in science and technology following a visit by Chinese astronauts.