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National aerospace scientists give lectures, meet students in Hong Kong (4)

(Xinhua) 09:31, June 24, 2021

Audience applause after the lecture at the Hong Kong Polytechnic University (PolyU) in Hong Kong, south China, June 23, 2021. (Xinhua/Wang Shen)


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(Web editor: Zhong Wenxing, Hongyu)

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