yes. The annual salary system means that after one year of work, you can receive the thirteenth month's salary. 13 salary is the double salary at the end of the year. In the second month of each year, the employer will pay employees one more month's salary. In some companies, employees will also be paid 13 salary when the construction period is over 12 months. Under the annual salary system, employees are required to work for 1.2 months before they can enjoy the annual salary.