Legal basis:
Measures for the administration of public security of seals Article 3 The term "seal" as mentioned in these Measures refers to the official seal and the personal seal with legal effect. The term "official seal" as mentioned in these Measures refers to the legal names of state power organs, party and government organs, judicial organs, organs participating in and discussing state affairs, armed forces, armed police, democratic parties, trade unions, Communist Youth League, women's federations and other organs, organizations, enterprises and institutions, civil affairs departments and registered non-governmental organizations, neighborhood committees, deliberation and coordination institutions and non-permanent institutions, as well as special seals for contracts, finance, taxation, invoices and other businesses with legal names. The term "personal seal with legal effect" as mentioned in these Measures refers to the seal of the legal representative of state power, party and government, judiciary, participating in and discussing state affairs, army, armed police, democratic parties, trade unions, * * Communist Youth League, women's federations and other organs, organizations, enterprises and institutions, civil affairs departments registered civil organizations, neighborhood committees, deliberation and coordination institutions, non-permanent institutions and the person in charge of their financial departments.
Article 490 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 is concluded when the parties sign, seal or fingerprint it. 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.