A bridge is seen at the Hengshui Lake state-level nature reserve wetland park in Hengshui, north China's Hebei Province, Sept. 15, 2017. (Xinhua/Zhu Xudong)
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A bridge is seen at the Hengshui Lake state-level nature reserve wetland park in Hengshui, north China's Hebei Province, Sept. 15, 2017. (Xinhua/Zhu Xudong)
