Maintenance fund, also known as "public maintenance fund" and "special maintenance fund", refers to the fund that the owners of residential properties pay a certain standard of money to a special account for the maintenance of public parts and facilities in the property area, and authorize the owners' committee to manage and use it in a unified way. The collection ratio of the maintenance fund shall be paid to the commercial bank designated by the real estate department of the district where the property is located according to the ratio of 2% to 3% of the total house price when the property buyer purchases the house from the developer and handles the property transfer.