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Former United Nations Secretary-General Ban Ki-moon speaks during an event for the 2019 World Environment Day in Hangzhou, east China's Zhejiang Province, June 5, 2019. (Xinhua/Huang Zongzhi)
Event for 2019 World Environment Day held in Hangzhou
Source: Xinhua| 2019-06-06 07:17:45|Editor: Liangyu
