The so-called rent-for-sale method is to rent the vacant commercial housing, sign a contract with the renter and buy the rented house during the contract period. The developer sells it to the renter at the rental price, and the rent paid by the renter during the lease period can offset part of the purchase price. The renter will get all the property rights of the house after paying the full house price. If the renter does not buy a house within the contract period, it will be treated as rent withdrawal, and the rent paid in advance can be used as the rent charged by the real estate developer.