TONGREN, Feb. 24, 2016 -- Tourists sit on a glass skywalk in the National Mine Park of Tongren City, southwest China's Guizhou Province, Feb. 24, 2016. The 1,005-meter-long and 1.6-meter wide glass skywalk, with more than 100 meters above the valley bottom, has passed a safety test and will be opened to the public in May. (Xinhua/Liu Xu)
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