Yes 18 months! Social security paid by enterprises for employees is enforced by the state, including endowment insurance, medical insurance, unemployment insurance, work injury insurance and maternity insurance. If the enterprise fails to pay work-related injury insurance and maternity insurance for employees, employees can complain to the labor arbitration department. According to the relevant regulations, if the employer fails to pay, pay in full or pay social insurance premiums on time, its responsibilities include: (1) compensating the unemployment insurance benefits loss that the laborer underpays or fails to pay; and (2) undertaking the maternity insurance benefits for female employees that should be paid by the maternity fund. (three) to bear the fines, late fees and other expenses related to work-related injury insurance premiums. (four) bear the basic old-age insurance related fines and other expenses. (five) compensation for other expenses caused to workers. For example, due to the employer's failure to pay social insurance premiums, it is impossible to transfer files in time, which will affect the wage loss of the re-employment of workers. Article 72 of the Labor Law stipulates: "Employers and laborers must participate in social insurance and pay social insurance premiums according to law." According to the provisions of the Labor Law, workers must sign labor contracts and pay insurance for employees from the day they go to work. The probation period with a contract term of more than three months but less than one year shall not exceed 1 month, the probation period with a contract term of more than 1 year but less than three years shall not exceed two months, and the probation period with a fixed term and an open-ended labor contract of more than three years shall not exceed six months.