Wuhan's Tangxun Lake is the largest urban lake in Asia, with a watershed area of 240.48 square kilometers and a water area of 47.62 square kilometers.

• There are numerous outlets, totaling 666, leading to problems of direct discharge of sewage and overflow during rainy days.
• The problem of misconnections in the pipe network is quite severe, with a total of 1,189 misconnection points.

• Precision pollution interception.
• Ecological purification.
• Construction of an intelligent drainage system.
• Intelligent operation and maintenance.