The Pu River, also known as the Xiaozi River, is a secondary tributary of the Yangtze River. In recent years, thanks to the effective use of the big data system of water environment management of "Dayu Water Control", "the clear and clean river I was a child has returned" Chongqing has launched the "handheld" APP of the sewage outlet into the river.

The system uses AI image recognition to automatically grasp problems such as river garbage around the section of 1 km to 3 km around the clock.