Fireworks light up the sky during a fireworks show to mark the 20th anniversary of Hong Kong's return to the motherland in Hong Kong, south China, July 1, 2017. (Xinhua/Wang Xi)
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Fireworks light up the sky during a fireworks show to mark the 20th anniversary of Hong Kong's return to the motherland in Hong Kong, south China, July 1, 2017. (Xinhua/Wang Xi)
