Two girls pose for photos at Chinese University of Hong Kong, in Hong Kong, south China, May 17, 2017. This year marks the 20th anniversary of Hong Kong's return to the motherland. (Xinhua/Liu Yun)
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Two girls pose for photos at Chinese University of Hong Kong, in Hong Kong, south China, May 17, 2017. This year marks the 20th anniversary of Hong Kong's return to the motherland. (Xinhua/Liu Yun)
