Legal analysis: I hold and use my signature or personal seal to show the true meaning of the parties and have the same effect as my signature. However, in judicial practice, if it is impossible to judge that the signature is my own use, and the signer himself can't confirm it because of loss of will, or can't judge the signer's explicit authorization and expression of will from other evidence, it is not enough to represent the signer's true meaning only by signing, and the signed document has no signature effect.

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.