Legal analysis: the signature can be stamped with the company seal. The corporate seal, also called the official seal, is round with a five-pointed star in the middle. The name of the unit engraved on the seal is the same as the name on its business license, which is arranged in a ring from left to right, with the enterprise-specific security code at the bottom. The official seal is the most effective of all seals and a symbol of legal person's rights. Unless there are special provisions in the law (such as stamping invoices), the official seal can represent the will of legal persons and sign contracts and other legal documents with high legal effect. All letters, official documents, contracts, letters of introduction, certificates or other company materials issued in the name of the company can use the official seal.

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.