Legal analysis
According to the law, if both parties conclude a contract in writing, there are three ways to make the contract established (legally speaking, there is still a difference between the establishment of the contract and the entry into force of the contract): First, both parties sign it. Second, both sides have valid seals. Third, both parties determine the way of signing or sealing in the contract. The above three methods are explained here: 1. Both parties are individuals, and the contract is established when both parties sign it. 2. If one party is an individual and the other party is a legal person or other organization recognized by law, the contract agreed by both parties is signed by both parties, which is also in compliance with the law. A contract may be signed by an individual, a legal person or the legal representative or person in charge of other organizations recognized by law. A contract may also be signed by the legal representative or a person expressly authorized by the person in charge. 3. If one of the two parties is an individual and the other is a legal person or other organization recognized by law, and the contract between the two parties stipulates that the legal person or other organization recognized by law must be sealed before the contract can be established, the legal person shall affix the official seal of the company or the special seal for the contract that has been filed with the Industrial and Commercial Bureau. 4. If both parties are legal persons or other organizations recognized by law, both parties can choose the legal representatives or responsible persons of both parties to sign to make the contract effective, or they can choose both parties to seal the contract, or they can choose both parties to sign and affix the official seal of the legal person or the special seal for the contract to make the contract effective.
legal ground
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.