Audience attend the lecture at the University of Hong Kong in Hong Kong, south China, June 23, 2021. (Xinhua/Li Gang)
National aerospace scientists give lectures, meet students in Hong Kong
Source: Xinhua| 2021-06-23 23:08:54|Editor: huaxia
Audience attend the lecture at the University of Hong Kong in Hong Kong, south China, June 23, 2021. (Xinhua/Li Gang)
