A contract shall be null and void under any of the following circumstances:

(1) A contract is concluded through the use of fraud or coercion by one party to damage the interests of the State;

(2) Malicious collusion is conducted to damage the interests of the State, a collective or a third party;

(3) An illegitimate purpose is concealed under the guise of legitimate acts;

(4) Damaging the public interests;

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