Photo taken on July 11, 2017 shows tourists visiting the Qixing Lake Scenic Area of Saihanba National Forest Park in Weichang Manchu and Mongolian Autonomous County in Chengde City, north China's Hebei Province. Saihanba is a vast forest covering nearly 75,000 hectares. It was a piece of barren land 55 years ago, but decades of afforestation efforts have turned it into an important ecological shield for Beijing and Tianjin. (Xinhua/Wang Xiao)

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