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Visitors view the models of carrier rockets during an event marking China's Space Day at the Harbin Institute of Technology in Harbin, capital of northeast China's Heilongjiang Province, April 24, 2018.(Xinhua/Wang Jianwei)
Visitors view the models of carrier rockets during an event marking China's Space Day at the Harbin Institute of Technology in Harbin, capital of northeast China's Heilongjiang Province, April 24, 2018.(Xinhua/Wang Jianwei)