A tripartite agreement is generally invalid if it is signed by both parties. If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. If the tripartite agreement is only signed by both parties, the contract has not yet been established and has no legal effect.

legal ground

Article 143 of the Civil Code of People's Republic of China (PRC)

A civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.

Article 490

If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.

A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.