DALI, Aug. 10, 2019 - Villagers eliminate water plants in Erhai Lake in Dali, southwest China's Yunnan Province, Aug. 10, 2019. Water quality of Erhai Lake has improved with active treatment since the beginning of this year.

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Tourists visit Erhai Lake in Dali, southwest China's Yunnan Province, Aug. 10, 2019.

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