Legal analysis: valid, and the signature has the same legal effect. Once the contract is concluded, it has legal effect immediately, and there is a relationship of rights and obligations between the two parties; Or change or eliminate the original civil legal relationship. If one or both parties fail to perform their obligations under the contract, they will be liable for breach of contract according to the contract or the law.

Legal basis: Article 464 of the Civil Code, a contract is an agreement between civil subjects to establish, change and terminate a civil legal relationship.

Agreements on status relations such as marriage, adoption and guardianship shall be governed by legal provisions on such status relations; If there are no provisions, the provisions of this part can be applied according to their nature.