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Full video: Shenzhou-14 crew's first livestream lecture from China Space Station
49:22

China livestreamed its first science class from the Wentian lab module of the space station on Wednesday. It's the first class delivered by the Shenzhou-14 taikonauts – Chen Dong, Liu Yang and Cai Xuzhe – who were sent to the space on June 5 for a six-month mission. 

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