A boat sails to a transit spot, where the waste water is temporarily stored for further processing, on Qiandaohu Lake in Chun'an County of east China's Zhejiang Province Aug. 16, 2017. The lake, a famous scenic spot, is under stricter protection now as the local government issued a zero emission policy according to which garbage disposal, residents' waste water and vehicle emission are under tighter control. (Xinhua/Xu Yu)
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