Legal analysis: when signing a contract, if there is no legal person to sign it, it is often necessary to affix the official seal of the company. It is not enough to sign only the employees of the company. After signing the contract, I don't know much about the format, validity period or other aspects of the contract.

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. A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established. According to this provision, the signatures or seals of the parties to a contract have legal effect.