Legal analysis: 1. The management of the use of seals shall implement the system of "dedicated personnel management, leadership approval, registration and filing".

2. The seal shall be kept by a dedicated person in the office. The place where the seal is placed must be safe, it must be locked at all times after use, and precautions must be taken during holidays.

3. The seal used by the agency to issue documents must be signed by the leader before it can be used.

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 or the parties agree that a contract should be concluded in writing. If the parties do not use writing but one party has performed its main obligations and the other party accepts it, the contract is established.