A written labor contract is valid as long as it is not invalid.
The invalidity situations stipulated in Article 26 of the Labor Contract Law include:
（1） Causing the other party to conclude or change the labor contract against its true intention by means of fraud, coercion or taking advantage of the other party's difficulties;
（2） The employer exempts itself from its legal responsibilities and excludes the rights of workers;
（3） Violating the mandatory provisions of laws and administrative regulations.
If there is a dispute over the invalidity or partial invalidity of a labor contract, it shall be confirmed by the labor dispute arbitration institution or the people's court.
Legal basis
Article 26 [Invalidation of Labor Contracts] of the Labor Contract Law of the People's Republic of China (2012 Revision): The following labor contracts are invalid or partially invalid:
（1） Causing the other party to conclude or change the labor contract against its true intention by means of fraud, coercion or taking advantage of the other party's difficulties;
（2） The employer exempts itself from its legal responsibilities and excludes the rights of workers;
（3） Violating the mandatory provisions of laws and administrative regulations.
If there is a dispute over the invalidity or partial invalidity of a labor contract, it shall be confirmed by the labor dispute arbitration institution or the people's court.
