Legal analysis: length of service is the working time of wage income that employees rely on or mainly rely on to make a living. I was a student when I was in college. I didn't take part in the work and had no salary, so I couldn't calculate the length of service.

Legal basis: Article 38 of the revised draft of the Detailed Rules for the Implementation of the Labor Insurance Regulations refers to the working hours when employees take wage income as their whole or main source of livelihood. When calculating the general length of service, it should include the length of service of the enterprise.