According to the official documents of the affiliated hospital of Chengdu University, the interns in the affiliated hospital of Chengdu University have no annual leave, and the employer has established labor relations with the workers. Workers who have worked continuously 1 year or more can enjoy paid annual leave. Interns have no labor relationship with employers, so they have no annual leave.

Intern refers to college students and secondary vocational students who have just graduated from a senior year or a major and studied practical work experience under the guidance of experienced staff. They are informal employees and are usually paid by the day. Unlike regular workers, they can enjoy the protection of pension and monthly minimum wage.