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Photo taken on Oct. 31, 2017 shows a primeval forest in Lhunze County of Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Purbu Zhaxi)
Xinhua Headlines: Qinghai-Tibet Plateau still one of cleanest regions on earth
Source: Xinhua| 2018-07-18 20:42:51|Editor: Xiang Bo
