Legal analysis: the legal person seal of a contract is a seal specially used for signing a contract, which has the same effect as the legal person signature, and there is no difference. A legal person is not a specific person, but a unit. Therefore, the corporate seal is actually the official seal of the unit. However, people are used to calling the real corporate seal the official seal and the legal representative seal the corporate seal, which has been established to some extent. Therefore, the circular corporate seal of an enterprise, institution or organization is referred to as the official seal, and the square corporate seal is referred to as the corporate seal, as long as both parties understand it.

Legal basis: Article 32 of the Civil Code of People's Republic of China (PRC) * * * If the parties conclude a contract in the form of a contract, the contract will be established when both parties sign or seal it.