When handing over the house, the developer will give you the instruction manual and test report of the commercial house. You can take these, pay the deed tax, maintenance fund and other expenses with your purchase invoice, and then give you the house key. The real estate license shall be handled by the developer. You can pay the money to see the house on the spot or measure it. General real estate surveying and mapping report issued by the Municipal Bureau of Surveying and Mapping.