Aerial photo taken on July 25, 2018 shows artificial floating islands set in a river for water purification in Chaohu City, east China's Anhui Province. (Xinhua/Ma Fengcheng)
A staff worker cleans up trash beside an artificial floating island set in a reservoir for water purification in Beibei District of Chongqing Municipality, southwest China, July 25, 2018. (Xinhua/Qin Tingfu)
Aerial photo taken on July 25, 2018 shows artificial floating islands set in a river for water purification in Chaohu City, east China's Anhui Province. (Xinhua/Ma Fengcheng)
A staff worker cleans up trash beside an artificial floating island set in a reservoir for water purification in Beibei District of Chongqing Municipality, southwest China, July 25, 2018. (Xinhua/Qin Tingfu)
