1, housing approval, that is, before the project is officially put on sale, the developer uses some preferential ways to attract consumers who are interested in buying a house to pay the registration fee, deposit and other fees to the seller in advance, obtain the registration number according to the payment time order, and enjoy the price discount and preferential treatment agreed upon when buying a house. Any form of subscription, internal subscription, VIP lottery and other acts are illegal acts of real estate developers before obtaining pre-sale permits, which are explicitly prohibited by the state.

2. Pre-sale of houses, also known as pre-sale of commercial houses and pre-sale of uncompleted residential flats, refers to the real estate transaction behavior that the real estate development enterprise and the purchaser agree that the purchaser will pay the deposit or advance payment and own an existing house at a certain date in the future. Its essence is the buying and selling of housing futures, which is just a futures contract of housing. It and existing home sales have become two main forms of housing sales in China commercial housing market. According to the relevant regulations, the pre-sale needs to be registered with the real estate management department of the people's government at or above the county level and obtain the pre-sale permit certificate of commercial housing.

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