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Staff members reinforce the cables of a suspension bridge at an outdoor park in Zhangjiajie, central China's Hunan Province, July 3, 2019. (Photo by Wu Yongbing/Xinhua)

Staff members reinforce the cables of a suspension bridge at an outdoor park in Zhangjiajie, central China's Hunan Province, July 3, 2019. (Photo by Wu Yongbing/Xinhua)