According to relevant official website information, the principal is jointly raised by the seller and the buyer, and the ownership belongs to the payer. Interest is used for the maintenance and conservation of public parts and facilities of residential buildings. When the interest is insufficient, it shall be shared by the property owner. The public * * * maintenance fund of the house selling unit is raised by the house selling unit and the house purchasing staff * * * and belongs to the house purchasing person, which is used for the maintenance of public * * * parts and * * * facilities and equipment after the warranty period of residential buildings expires. For details, you can inquire/consult the local authorities to obtain first-hand information.