The conditions for a valid contract are: first, both parties to the contract must have the ability to conclude a contract. The parties to a contract must have corresponding capacity for civil conduct. Among them, the contract concluded by a person without civil capacity is invalid; A civil juristic act that restricts a person's capacity for civil conduct to obtain pure benefits or a civil juristic act that is appropriate to his age, intelligence and mental health is valid; Other civil juristic acts shall take effect with the consent or ratification of the legal representative. Second, the intention of the parties to the contract is true. The expression of true will means that the actor's internal expression of will is consistent with the external expression of will in establishing, changing and terminating civil legal relations. According to the law, the parties have the right to apply for modification or cancellation of a contract concluded under the condition that the expression of will is untrue. Third, it does not violate the mandatory provisions of laws and administrative regulations and does not harm the public interest.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 502 A lawfully formed contract shall become effective upon its formation, unless otherwise provided by law or agreed by the parties.

In accordance with the provisions of laws and administrative regulations, if the contract should go through the approval procedures, such provisions shall prevail. If the failure to go through the formalities such as approval affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party that should go through the formalities for approval fails to perform its obligations, the other party may require it to bear the responsibility for violating its obligations.

The modification, assignment and dissolution of a contract shall be subject to the provisions of laws and administrative regulations, and the provisions of the preceding paragraph shall apply and shall be subject to approval.