Volunteers collect waste in river in Yingfeng Village of Hangzhou

Aerial photo taken on May 11, 2020 shows volunteers collecting waste in a river in Yingfeng Village of Tuankou Township in Hangzhou City, east China's Zhejiang Province.

Aerial photo taken on May 11, 2020 shows volunteers collecting waste in a river in Yingfeng Village of Tuankou Township in Hangzhou City, east China's Zhejiang Province.

Photo taken on May 11, 2020 shows volunteers collecting waste in a river in Yingfeng Village of Tuankou Township in Hangzhou City, east China's Zhejiang Province.

Guangzhou resumes classes for 1st and 2nd grades of junior, senior high schools Prevention measures taken at Sanmin residential community in Wuhan