The so-called "pre-service education" is the training before people formally enter the workplace. The main target of education is students who are about to face their first job.

In the so-called personnel management system of teaching, examination, training and application, training is the premise of personnel appointment. Part of junior high school advanced training implemented by training institutions such as labor preparation training and technical schools belongs to pre-service training. The labor reserve system refers to a new training and employment system established and implemented by the state to improve the quality of young workers, cultivate the labor reserve army and promote the employment of young workers. According to the relevant regulations of the state, starting from 1999, the labor reserve system has been widely implemented in cities and towns across the country, and new laborers and other job seekers have been organized to receive 1-3 years of vocational training and vocational education before employment, so that they can obtain corresponding vocational qualifications or master certain vocational skills, and with the guidance and help of national policies, they can achieve employment through the labor market. In addition, workers who want to engage in the occupations stipulated by the state (mainly occupations (jobs) with complex technology and wide versatility, involving state property, people's life safety and consumers' interests) must go through pre-job education and obtain professional qualification certificates before they can get employment. Under the premise that the employment situation is increasingly severe and the demand of school education and enterprises is out of touch, it is also an important task for schools and governments to do a good job in general pre-job training between school education and enterprise recruitment.