Legal basis: Article 45 of the Measures for the Administration of Urban Real Estate in People's Republic of China (PRC) shall meet the following conditions: (1) All land use right transfer fees have been paid and land use right certificates have been obtained; (2) Holding a construction project planning permit; (three) according to the pre-sale of commercial housing, the investment in development and construction has reached more than 25% of the total investment in engineering construction, and the construction progress and completion delivery date have been determined; (four) to the real estate management department of the people's government at or above the county level for pre-sale registration, and obtain the pre-sale permit certificate of commercial housing. The pre-sale of commercial housing shall, in accordance with the relevant provisions of the state, report the pre-sale contract to the real estate management department and land management department of the people's government at or above the county level for registration. The proceeds from the pre-sale of commercial housing must be used for related projects.