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Aerial photo taken on Aug. 10, 2019 shows a tributary of Erhai Lake in Dali, southwest China's Yunnan Province. Water quality of Erhai Lake has improved with active treatment since the beginning of this year. (Xinhua/Qin Qing)
Water quality of Erhai Lake improves with active treatment
Source: Xinhua| 2019-08-10 21:29:44|Editor: mingmei
