High-tech measures applied to improve river ecosystem in Hangzhou

A sanitation worker collects wastes from an unmanned patrolling and waste collecting machine by a river in Hangzhou, east China's Zhejiang Province, Oct. 21, 2020. 

Aerial photo taken on Oct. 21, 2020 shows an unmanned patrolling and waste collecting machine works in a river in Hangzhou, east China's Zhejiang Province.

An unmanned patrolling and waste collecting machine works in a river in Hangzhou, east China's Zhejiang Province, Oct. 21, 2020. 

Annual rice yield to remain above 200m tons Sunset scenery of Lishan Mountain in Xi'an, NW China's Shaanxi