A contract is as valid as a signature, and it is almost as effective as a fingerprint or seal. If there is no legal invalidity of a general contract and it does not violate the autonomy of the parties, it will generally take effect from the date of the establishment of the contract, and only signing it will not affect the validity of the contract. Legal objectivity:

Article 49 of the Civil Code 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.