Because if you rent a house now, you have to bring your ID card to the police station in your jurisdiction to apply for a residence permit. The residence permit information is networked nationwide and can be enjoyed by the public security system. However, only a few institutions have the right to inquire. If personal information is leaked at will, citizens have the right to report it, investigate the responsibility and demand compensation.
legal ground
"Measures for the Administration of Urban Housing Leasing" Article 13 Housing leasing shall be registered and put on record. If the lease contract is signed, changed or terminated, the parties concerned shall register with the housing increase management department of the people's government of the city or county where the house is located.