Legal analysis: The central idea of the statement of personal commitment to no housing is: to the households with registered residence in this city who already own a house, and the households without registered residence in this city who hold a valid temporary residence permit in this city and have paid social insurance or personal income tax in this city for more than five consecutive years (including new commercial housing and second-hand housing); For households with registered residence in this city who already own two or more houses, households with non-registered residence in this city who own one or more houses, households with non-registered residence in this city who cannot provide valid temporary residence permits in this city and have paid social insurance or personal income tax payment certificates in this city for more than five consecutive years (inclusive), the sale of houses to them in this city will be suspended.

Legal basis: Article 29 of the Civil Code of the People's Republic of China

The establishment, alteration, transfer and extinction of the real right of immovable property shall take effect after being registered according to law; Without registration, it will not take effect, except as otherwise provided by law.

the ownership of natural resources owned by the state according to law may not be registered.

article 21 the registration of immovable property shall be handled by the registration institution where the immovable property is located.

the state implements a unified registration system for real estate. The scope, registration organization and registration method of unified registration shall be stipulated by laws and administrative regulations.

article 211 when applying for registration, the parties concerned shall provide ownership certificates, real estate boundary, area and other necessary materials according to different registered items.

article 217 the certificate of ownership of immovable property is the proof that the obligee enjoys the real right of the immovable property. The items recorded in the certificate of real estate ownership shall be consistent with the real estate register; If the records are inconsistent, unless there is evidence to prove that the real estate register is indeed wrong, the real estate register shall prevail.