If the rent is not paid, the signed contract is still valid, unless otherwise agreed by the parties. A lease contract is an agreement that defines the rights and obligations of both parties. When both parties reach an agreement on the contents of the lease contract, the contract is established and becomes legally effective once it is signed and sealed.

Legal objectivity:

People's Republic of China (PRC) Civil Code

Article 2 15

A contract concluded between the parties on the establishment, alteration, transfer and elimination of the real right of immovable property shall come into effect upon the establishment of the contract, unless otherwise provided by law or agreed by the parties;

Failure to register the real right shall not affect the validity of the contract.

People's Republic of China (PRC) Civil Code

Article 502

A legally established contract shall come into force upon its establishment, except as otherwise provided by law or agreed by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should go through the approval procedures, such provisions shall prevail. If the failure to go through the formalities such as approval affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party that should go through the formalities for approval fails to perform its obligations, the other party may require it to bear the responsibility for violating its obligations. The modification, assignment and dissolution of a contract shall be subject to the provisions of laws and administrative regulations, and the provisions of the preceding paragraph shall apply and shall be subject to approval.