
Members of a watercourse patrol team clean the Hangu section of Liangtan River in southwest China's Chongqing, July 14, 2021. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts.Photo:Xinhua

Aerial photo taken on July 14, 2021 shows the Hangu section of Liangtan River in southwest China's Chongqing. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts.Photo:Xinhua

Tourists enjoy themselves at the wetland park of the Hangu section of Liangtan River in southwest China's Chongqing, July 14, 2021. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts..Photo:Xinhua

Aerial photo taken on July 14, 2021 shows the Hangu section of Liangtan River in southwest China's Chongqing. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts.Photo:Xinhua

Members of a watercourse patrol team clean the Hangu section of Liangtan River in southwest China's Chongqing, July 14, 2021. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts.Photo:Xinhua

Tourists walk along the Hangu section of Liangtan River in southwest China's Chongqing, July 14, 2021. The water quality and ecosystem of Liangtan River in Chongqing has been improved in recent years thanks to the city's ecological restoration efforts. Photo:Xinhua