Legal analysis: the signature of the parties is a sign of agreement and acceptance in law. The signatory shall be responsible for the possible legal consequences of his actions. If someone else signed the contract, it should be entrusted by the parties in writing or ratified afterwards, otherwise it is not legally binding on the parties.

Legal basis: Article 586 of the Civil Code of People's Republic of China (PRC), the parties may agree that one party shall pay a deposit to the other party as a guarantee for the creditor's rights. The deposit contract is established when the deposit is actually paid. The amount of the deposit shall be agreed by the parties; However, it shall not exceed 20% of the subject matter of the main contract, and the excess shall not have the effect of deposit. If the actual amount of deposit paid is more than or less than the agreed amount, it shall be deemed as a change of the agreed amount of deposit.