Legal analysis: As long as the handwritten part does not violate the mandatory provisions of the law, it is valid.

Legal basis: "The People's Republic of China and the Civil Code"

Article 471 The parties may enter into a contract by way of offer, acceptance or other means.

Article 490: If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign, seal or fingerprint. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it. Laws and administrative regulations stipulate or the parties agree that a contract should be concluded in written form. If the parties do not use written form but one party has performed its main obligations and the other party accepts it, the contract is established.