Legal analysis: signing a contract can be stamped with a private seal. But there are certain legal risks. Because there are no clear restrictions and regulations on citizens' private engraving of seals in our country, and there is no mandatory filing, the effectiveness and probative force of citizens' private engraving of seals will be far less than that of company seals. A contract signed only by a citizen's private seal shall not be regarded as a confirmation of the contents of the contract, unless there is the personal signature of the parties on one side of the private 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.