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A researcher shows a prototype of the topography camera deployed on China's Chang'e-4 probe in Chengdu, southwest China's Sichuan Province, Jan. 17, 2019. (Xinhua/Liu Kun)
A researcher shows a prototype of the topography camera deployed on China's Chang'e-4 probe in Chengdu, southwest China's Sichuan Province, Jan. 17, 2019. (Xinhua/Liu Kun)