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An industrial robot solves a Rubik's Cube during the Qingdao International Software Convergence & Innovation Expo in Qingdao, east China's Shandong Province, July 25, 2019. (Xinhua/Li Ziheng)

An industrial robot solves a Rubik's Cube during the Qingdao International Software Convergence & Innovation Expo in Qingdao, east China's Shandong Province, July 25, 2019. (Xinhua/Li Ziheng)