Article 34 of the Measures for the Administration of Commercial Housing Sales?
Real estate development enterprises should entrust units with real estate surveying and mapping qualifications to carry out surveying and mapping according to the project before the delivery of commercial housing, and the surveying and mapping results should be reported to the real estate administrative department for examination and approval before they can be used for housing ownership registration.
Real estate development enterprises shall, within 60 days from the date of delivery of commercial housing, submit the information required for housing ownership registration to the real estate administrative department where the housing is located.
Real estate development enterprises shall assist the buyers of commercial housing to handle the procedures of land use right change and house ownership registration.