According to the Labor Contract Law

Article 26 The following labor contracts are invalid or partially invalid:

(1) Causing the other party to conclude or change a labor contract against its true meaning by means of fraud, coercion or taking advantage of the danger of others;

(2) The employer exempts itself from legal liability and excludes the rights of workers;

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

Any dispute over the invalidity or partial invalidity of a labor contract shall be confirmed by the labor dispute arbitration institution or the people's court.

Article 39 The employing unit may terminate the labor contract under any of the following circumstances:

(a) during the probation period, it is proved that it does not meet the employment conditions;

(two) a serious violation of the rules and regulations of the employer;

(three) serious dereliction of duty, corruption, causing great damage to the employer;

(4) The laborer establishes labor relations with other employers at the same time, which has a serious impact on the completion of the work tasks of the unit, or the employer refuses to correct it;

(5) The labor contract is invalid due to the circumstances specified in Item 1 of Paragraph 1 of Article 26 of this Law;

(6) Being investigated for criminal responsibility according to law.