The maintenance fund is used for the maintenance of public parts and facilities in the community, and is supervised by specialized agencies or community owners' committees. This money is used for the maintenance of public parts and facilities in the community and cannot be returned directly. Only after the warranty period of the community expires can the money be used, and more than two-thirds of the owners agree to use it. If the money is used up, then the owners of the community still need to pay again. The account balance cannot be less than 30%.