Tourists visit an ice cave in Luyashan scenic area in Ningwu County of Xinzhou City, north China's Shanxi Province, May 4, 2019. According to research, the ice cave with a depth of 100 meters came into being 3 million years ago. (Xinhua/Cao Jianguo)
Tourists visit ice cave in Luyashan scenic area, north China's Shanxi
Source: Xinhua| 2019-05-05 11:58:33|Editor: Lu Hui
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