legal ground
Article 2 10 of the Civil Code of People's Republic of China (PRC)
The registration of real estate shall be handled by the registration agency where the real estate is located.
The state implements a unified registration system for real estate. The scope, organization and method of unified registration shall be stipulated by laws and administrative regulations.
Article 2 14
The establishment, alteration, transfer and extinction of the real right of real estate that should be registered according to law shall take effect when it is recorded in the real estate register.
Article 223
The registration fee for real estate shall be charged piece by piece, and shall not be charged according to the area, volume or price ratio of real estate.