If no written labor contract is signed, it is an irregular labor relationship, and the worker can terminate the labor relationship at any time. If an employer fails to conclude a written labor contract with a worker for more than one month but less than one year from the date of employment, it shall pay twice the monthly salary to the worker.
 According to Article 38 of the Labor Contract Law, a worker may terminate the labor contract in any of the following circumstances:
 （1） Failing to provide labor protection or working conditions as agreed in the labor contract;
 （2） Failing to pay labor remuneration in full and on time;
 （3） Failing to pay social insurance premiums for workers according to law;
 Article 82 stipulates that if a written labor contract has not been concluded with a worker for more than one month but less than one year since the date of employment, the worker shall be paid twice the monthly salary.