A contract is valid only if the signature is the true intention of both parties, and the contents of the contract do not violate the mandatory provisions of laws and administrative regulations, public order and good customs.

according to the provisions of the civil code of the people's Republic of China, if the parties conclude a contract in the form of a contract, the contract shall be formed when all the parties sign, seal or fingerprint it. 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 writing as stipulated by laws and administrative regulations or agreed by the parties. If the parties fail to do so in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.

therefore, the contract is valid only if the signature is not pressed by the handprint, as long as the signature is the true intention of both parties, and the contents of the contract do not violate the mandatory provisions of laws and administrative regulations, public order and good customs.

To sum up:

The contract is still valid as long as the conditions stipulated by law are met, only the signature is not pressed by the handprint. Therefore, when signing a contract, it is suggested that both parties should confirm their fingerprints at the same time to increase the legal effect of the contract.

Legal basis:

Article 49 of the Civil Code of the People's Republic of China.