The collection of residential special maintenance funds in our city began on February, 2006 15, and the municipal residential special maintenance fund management center is responsible for the management, supervision and guidance of the collection and use of maintenance funds. According to Article 8 of the Trial Measures for the Management of Special Maintenance Funds for Urban Houses in Harbin, the first maintenance funds for commercial houses (including affordable houses) shall be deposited by the owners. (a) before the sale of commercial housing, the construction unit, as the owner, shall deposit 2% of the cost price per square meter of construction area in a special bank before handling the formalities for filing the sale of commercial housing; (two) after the sale of commercial housing, the purchaser, as the owner, should deposit 2% of the cost price per square meter of construction area in a special bank before handling the registration of housing ownership ".