Qi Faren (C Front), an academician of the Chinese Academy of Engineering and former chief designer of Shenzhou spaceships, poses for a group photo with students at the Queen's College in south China's Hong Kong, June 25, 2021. (Xinhua/Li Gang)

Students attend a lecture given by space scientists at the Po Leung Kuk Ho Yuk Ching College in south China's Hong Kong, June 25, 2021. (Xinhua/Wang Shen)

Qi Faren (L), an academician of the Chinese Academy of Engineering and former chief designer of Shenzhou spaceships, interacts with students at the Queen's College in south China's Hong Kong, June 25, 2021. (Xinhua/Li Gang)

Qi Faren (2nd L), an academician of the Chinese Academy of Engineering and former chief designer of Shenzhou spaceships, interacts with students at the Queen's College in south China's Hong Kong, June 25, 2021. (Xinhua/Li Gang)

Students welcome space scientists at the Po Leung Kuk Ho Yuk Ching College in south China's Hong Kong, June 25, 2021. (Xinhua/Wang Shen)

Xie Jun, chief designer of the BDS-3 satellite system, gives students a lecture at the Po Leung Kuk Ho Yuk Ching College in south China's Hong Kong, June 25, 2021. (Xinhua/Wang Shen)