Legal analysis: the signing of a contract is not as legal as the legal representative. The key is that the contract should be sealed and the signatory should have a power of attorney from the legal representative.

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.