Legal analysis: A contract signed by a legal person but not stamped with a seal is valid. A contract signed by a company’s legal representative within the company’s business scope and within the scope of authority is valid even if it is not stamped with an official seal, unless the parties otherwise agree. There is an agreement. The legal representative of a company shall be the chairman, executive director or manager in accordance with the provisions of the company's articles of association, and shall be registered in accordance with the law.

Legal basis: Article 490 of the "People's Republic of China and Civil Code" Where the parties conclude a contract in the form of a contract, the contract is 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.