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Photo taken on Nov. 23, 2017 shows the Lalu wetland in Lhasa, capital of 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
