Legal analysis: The contract requires the signature of the legal representative. However, if other persons in charge or directly responsible persons of the company are authorized by the company, they can also sign in the name of the company and affix the company seal, and their signatures will be valid.

Legal basis: Article 490 of the "People's Republic of China and Civil Code", if the parties conclude a contract in the form of a contract, the contract is established when both parties sign, seal or fingerprint.