In any of the following circumstances, the contract is invalid:

(1) One party enters into a contract by means of fraud or coercion, which harms the interests of the state; ?

(2) Malicious collusion that harms the interests of the state, the collective or a third party; ?

(3) Covering up illegal purposes in a legal form; ?

(4) damaging the public interest; ?

(5) Violating the mandatory provisions of laws and administrative regulations.

Extended data:

According to the Contract Law of People's Republic of China (PRC):

Article 9 When concluding a contract, the parties shall have corresponding capacity for civil rights and capacity for civil conduct. The parties may entrust an agent to conclude a contract according to law.

Article 10 The parties may conclude a contract in writing, orally or in other forms. If laws and administrative regulations stipulate that it should be in writing, it should be in writing. If the parties agree to use written form, it shall be in written form.

Article 12 The contents of a contract shall be agreed upon by the parties, and generally include the following clauses:

(1) The name and domicile of the party concerned; ?

(2) Subject matter; ?

(3) quantity; ?

(4) quality; ?

(5) Price or remuneration; ?

(6) Time limit, place and method of performance; ?

(7) Liability for breach of contract; ?

(8) Methods for resolving disputes. ?

The parties may conclude a contract by referring to the model texts of various contracts.

Article 13 When concluding a contract, the parties shall take the form of offer and acceptance.