As long as the content does not violate the mandatory provisions of laws and regulations and is the true expression of intention of the parties to the contract, the contract will be valid after all parties sign on the signature page. There is no mandatory requirement in law to sign at the seam. is effective.

According to the "Contract Law of the People's Republic of China":

Article 44 Effectiveness of Contract

A contract established in accordance with the law shall be effective from the time of establishment. Take effect. If laws and administrative regulations stipulate that approval, registration and other procedures must be completed to take effect, such provisions shall apply.

Article 45 Conditional Contract

The parties may agree on conditions for the validity of the contract. A contract with conditions for effectiveness shall take effect when the conditions are fulfilled. A contract with rescission conditions shall become invalid upon fulfillment of the conditions. If the parties improperly prevent the fulfillment of the conditions for their own interests, the conditions shall be deemed to have been fulfilled; if the parties improperly facilitated the fulfillment of the conditions, the conditions shall be deemed not to have been fulfilled.

Article 46 Contract with a time limit

The parties may agree on a time limit for the validity of the contract. A contract with an effective time limit shall take effect when the time limit expires. A contract with a termination period shall become invalid upon expiration of the period.

Extended information:

According to the "Contract Law of the People's Republic of China":

Article 52 Legal circumstances in which a contract is invalid

A contract will be invalid if any of the following circumstances occurs:?

(1) One party enters into the contract by means of fraud or coercion, harming national interests;?

(2) Malicious collusion to harm the interests of the country, the collective or a third party; (3) concealing illegal purposes in legal forms; (4) harming the interests of the public; ?

(5) Violation of mandatory provisions of laws and administrative regulations.

Article 53: Invalidity of contract exemption clauses

The following exemption clauses in the contract are invalid:?

(1) Causing personal injury to the other party;?

(2) Causing property losses to the other party due to intention or gross negligence.

Article 54 Cancellable Contracts

For the following contracts, one party has the right to request the people's court or arbitration institution to change or cancel:?

(1) The contract was concluded due to a major misunderstanding;?

(2) The contract was obviously unfair when it was concluded.

If one party uses fraud, coercion or takes advantage of others' danger to cause the other party to enter into a contract against its true intention, the injured party has the right to request the people's court or arbitration institution to change or cancel the contract. If a party requests a change, the people's court or arbitration institution shall not revoke it.

Article 55 Extinction of the right of revocation

The right of revocation shall be extinguished under any of the following circumstances:?

(1) The party with the right of revocation Failure to exercise the right of revocation within one year from the date when the party knew or should have known the reason for revocation;?

(2) The party with the right to rescind clearly stated or gave up the right to rescind by his own behavior after knowing the reason for revocation.

Article 56: Contract invalid and partially valid from the beginning

An invalid contract or a revoked contract has no legal binding force from the beginning. If part of a contract is invalid, it does not affect the validity of other parts, which remain valid.

Baidu Encyclopedia-Contract Law of the People's Republic of China