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Xi congratulates on operation of Baihetan Hydropower Station

02:33 Chinese President Xi Jinping on Monday sent a congratulatory letter on the operation of the first batch of generating units at Baihetan Hydropower Station in sout

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Looking back at 2020: Space program engineer's biggest moments

02:26 Cai Xiaodong said he had a "bumper harvest" kind of year in 2020.With China Academy of Space Technology, Cai is the chief designer of the power supply system for