One party entered into a contract by means of fraud or coercion, thereby harming the interests of the State; Malicious collusion harms the interests of the state, the collective or a third party; Cover up illegal purpose in legal form; Damage to social and public interests; Violation of mandatory provisions of laws and administrative regulations. A contract under any of the above circumstances is invalid. According to the provisions of China's Contract Law, if the contract infringes the interests of a third party, the third party has the right to request the court to confirm that the contract is invalid.
 Legal basis:
 Article 506 of the Civil Code? The following exemption clauses in the contract are invalid:
 （1） Causing personal damage to the other party;
 （2） Causing property losses to the other party due to intentional misconduct or gross negligence.