Apprentices should sign contracts. China's Labor Contract Law stipulates that if an employer fails to conclude a written labor contract with a worker more than one month but less than one year after the date of employment, it shall pay twice the salary to the worker every month. In addition, the Regulations on the Implementation of the National Labor Contract Law stipulates that if an employer fails to conclude a written labor contract with a worker more than one month but less than one year after the date of employment, it shall pay twice the salary to the worker every month in accordance with Article 82 of the Labor Contract Law, and sign a written labor contract with the worker; If the laborer does not conclude a written labor contract with the Employer, the Employer shall notify the laborer in writing to terminate the labor relationship and pay economic compensation in accordance with Article 47 of the labor contract. The starting time for the employer to pay twice the monthly salary to the worker as specified in the preceding paragraph is the day after the expiration of one month from the date of employment, and the deadline is the day before the written labor contract is supplemented.
 Legal basis
 Article 82 of the Labor Contract Law of the People's Republic of China (2012 Revision) [Legal liability for not concluding a written labor contract] If an employer fails to conclude a written labor contract with a worker more than one month but less than one year after the date of employment, it shall pay twice the salary to the worker every month.
 If an employer, in violation of the provisions of this Law, does not conclude a non fixed term labor contract with a worker, it shall pay twice the salary to the worker every month from the date when the non fixed term labor contract should be concluded.
 Article 6 of the Regulations for the Implementation of the Labor Contract Law of the People's Republic of China, if an employer has not concluded a written labor contract with a worker for more than one month but less than one year since the date of employment, it shall pay twice the monthly salary to the worker in accordance with Article 82 of the Labor Contract Law, and sign a written labor contract with the worker; If the laborer does not conclude a written labor contract with the Employer, the Employer shall notify the laborer in writing to terminate the labor relationship and pay economic compensation in accordance with Article 47 of the labor contract. The starting time for the employer to pay twice the monthly salary to the worker as specified in the preceding paragraph is the day after the expiration of one month from the date of employment, and the deadline is the day before the written labor contract is supplemented.