The principal is jointly raised by the selling unit and the purchasing unit, and the ownership belongs to the payer. Interest is used for the maintenance of public parts and facilities of residential buildings. When the interest is insufficient, it shall be shared by the property owner.
Overhaul fund, also known as housing maintenance fund, includes housing public facilities special fund and housing maintenance fund. Special funds to implement the principle of "money with the house". When the house is transferred, the remaining funds in the account are also transferred to the new owner of the house.