Hello, I'm glad to answer your questions. When water conservancy is invoiced, water conservancy fund is a special fund for water conservancy construction, which consists of central water conservancy construction fund and local water conservancy construction fund. The central water conservancy construction fund is used for the construction of key water conservancy projects related to the overall social and economic development; The local water conservancy construction fund is mainly used for local water conservancy projects. The central water conservancy construction fund is mainly extracted from vehicle purchase tax income, railway construction fund and port construction fee income. The source of local water conservancy construction funds is divided into two parts, one of which is also extracted from local government funds, administrative fees and urban maintenance and construction taxes; The other part needs to be collected from enterprises, institutions and individual operators.