According to the relevant laws and regulations, if the parties conclude a contract in the form of a contract, the contract will 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.
In any of the following circumstances, the contract is invalid:
1, the parties to the contract have no corresponding capacity for civil conduct;
2. The expression of intention of the contract is false;
3. The contract violates public order and good customs;
4. Violate the mandatory provisions of laws and regulations of the contract;
5. The parties to a contract collude in bad faith and harm the legitimate rights and interests of others.
Legal basis:
civil law
Article 146
A civil juristic act in which the actor and the counterpart have false meanings is invalid.
Article 153
A civil juristic act that violates the mandatory provisions of laws and administrative regulations is invalid. However, unless mandatory provisions do not invalidate civil legal acts. A civil legal act that violates public order and good customs is invalid.
Article 154
A civil legal act in which the actor and the counterpart collude maliciously and harm the legitimate rights and interests of others is invalid.