Legal analysis: As long as the legal representative negotiates business on behalf of the legal entity, the act of signing a civil contract has the same legal effect as the act of stamping the official seal of the legal entity, and the contract liability should be limited to the signature of the legal representative, but not all the signatures of the legal representatives of the legal entity have the effect of representing the legal entity.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). 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.