1. When commercial housing is sold, the purchaser and the sales unit shall conclude a maintenance fund payment agreement, and the purchaser shall pay the maintenance fund to the sales unit according to the proportion of 2-3% of the purchase price. 2. The maintenance fund collected by the selling unit belongs to all owners and is not included in the residential sales income. 3. The current deposit standard of the first special maintenance fund is: 90 yuan/m2 for high-rise buildings (including multi-storey buildings with elevators) and 50 yuan/m2 for multi-storey buildings (including villas). Some cities charge 20 yuan one square meter for multi-storey buildings, so that they can call the staff of the local housing authority.