No, length of service refers to the working years of employees whose whole or main source of income is wages. Length of service is generally an important basis for determining employees' wages, enjoying labor insurance benefits and enjoying certain welfare benefits. There are three main types of length of service: 1. General length of service, also known as total length of service, refers to the total working years of workers or staff. In China, the general length of service was once a condition for determining the retirement benefits of employees. 2. The length of service of this enterprise, also called continuous length of service in China, uninterrupted length of service in the Soviet Union and enterprise length of service in Japan, refers to the time that workers or staff work continuously in a certain unit (including the transfer approved by the organization), which is an integral part of the general length of service. 3, the length of service of a specific job, refers to the workers and staff engaged in a specific job, but in any specific position or work in a specific department.