Passengers take the MTR South Island Line in Hong Kong, south China, Dec. 28, 2016. The MTR South Island Line started operation on Wednesday. (Xinhua/Lui Siu Wai)
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Passengers take the MTR South Island Line in Hong Kong, south China, Dec. 28, 2016. The MTR South Island Line started operation on Wednesday. (Xinhua/Lui Siu Wai)
