Legal basis: Article 16 of the Measures for the Administration of Commercial Housing Sales. When a real estate development enterprise sells commercial housing, it shall conclude a written contract for the sale of commercial housing with the buyer. A contract for the sale of commercial housing shall contain the following main contents: (1) the name and domicile of the parties; (2) Basic information of commercial housing; (three) the way of commercial housing sales; (four) the method of determining the price and total price of commercial housing, the method of payment and the time of payment; (5) Terms and date of delivery; (six) decoration, equipment standards commitment; (seven) water supply, power supply, heating, gas, communications, roads, greening and other supporting infrastructure and public facilities delivery commitments and related rights and responsibilities; (eight) the ownership of public buildings; (nine) the way to deal with the area difference; (10) Handling matters related to the registration of property rights; (eleven) the method of dispute resolution; (12) Liability for breach of contract; (13) Other matters agreed by both parties.