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China's first cargo spacecraft Tianzhou-1, atop a Long March-7 Y2 carrier rocket, blasts off from Wenchang Space Launch Center in south China's Hainan province, April 20, 2017. (Xinhua/Guo Cheng)
China's first cargo spacecraft Tianzhou-1, atop a Long March-7 Y2 carrier rocket, blasts off from Wenchang Space Launch Center in south China's Hainan province, April 20, 2017. (Xinhua/Guo Cheng)