1. In principle, the lessor and all lessees need to sign a contract. However, if the joint tenants sign an entrustment agreement, stipulating that one person will sign the contract on behalf of the owner, the lease contract may be signed only by the trustee and the lessor.

2. Both the lessor and the two lessees have the right to use the leased house. If only one of them signs the lease contract, the other person may constitute sublease. If the lessee sublets without the consent of the lessor, the lessor may terminate the contract.

The obligations of the lessor in the lease contract:

1, deliver the leased property. The lessor shall deliver the lease item in the time and manner agreed in the contract. If the delivery of possession requires the use of the property, the lessor shall deliver the property to the lessee for actual possession and use as agreed. If the use of the property is not necessary for delivery and possession, the lessor shall make it available to the lessee. If the lease item has been directly occupied by the lessee when the contract is established, the lessee has the right to use the lease item from the delivery time agreed in the contract;

2. Keep the leased property in line with the agreed purpose during the lease term. The lease contract is a continuous contract. During its existence, the lessor has the obligation to continue to maintain the legal or agreed quality of the lease item, so that the lease item can reach the agreed use income state. If the quality declines and damages the lessee's use income or other rights, it shall be maintained, repaired and restored to its original state. If the use and income of the lessee are affected by the repair of the leased property, the lessor shall correspondingly reduce the rent or extend the lease term, except that the repair is carried out by the lessee according to the agreement or custom, or the damage of the leased property is caused by the lessee's fault;

3. Object defect guarantee. The lessor shall ensure that the delivered lease item can be in the normal use and profitable state of the lessee according to the contract, that is, the delivered subject matter must be suitable for the agreed purpose;

4. Obligation to guarantee the defects of rights. The lessor shall ensure that the lessee will not be unable to use the lease item in accordance with the contract because he claims the right to the lease item for a third party.

To sum up, we must make it clear to the landlord how many people live, otherwise it can be considered as a breach of contract. It is best for all three people to sign the contract, so that all three people have a share in the house. If only one person's name is signed, it is suggested that others sign a sharing agreement with that person, stating that the rent is shared by three people, and all three people have the right to rent the house.

Legal basis:

Article 470 of the Civil Code of People's Republic of China (PRC)

The contents of a contract shall be agreed upon by the parties, and generally include the following clauses:

(1) The name and domicile of the party concerned;

(2) Subject matter;

(3) quantity;

(4) quality;

(5) Price or remuneration;

(6) Time limit, place and method of performance;

(7) Liability for breach of contract;

(8) Methods for resolving disputes.

The parties may conclude a contract by referring to the model texts of various contracts.

Article 703

A lease contract is a contract in which the lessor delivers the lease item to the lessee for use and income, and the lessee pays the rent.

Article 704

The contents of the lease contract generally include terms such as name, quantity, purpose, lease term, rent and its payment term and method, lease maintenance, etc.