According to Article 58 of the General Principles of Civil Law: "The following civil acts are invalid: (1) acts committed by persons without civil capacity; (2) A person with limited capacity for civil conduct cannot independently implement it according to law; (3) One party makes the other party act against its true meaning by means of fraud, coercion or taking advantage of others' danger; (4) Malicious collusion that harms the interests of the state, the collective or a third party; (5) Violating laws or public interests; (six) the economic contract violates the mandatory plan of the state; (seven) to cover up illegal purposes in a legal form. An invalid civil act is not legally binding from the beginning. "