Files are sent back to the place of origin, usually local talent centers, and some places are called human resources and social security bureaus; It won't be sent to the labor bureau. Their functions are different.
To retrieve the files of students' origin, they should report to the department with the registration card within the time specified in the registration card. You can handle personnel agency or file affiliation, and the difference lies in whether to retain the status of cadres.
Be sure to apply for a file agent or an affiliate, otherwise it will affect your calculation length. Nowadays, many cities implement online registration, which saves the step of on-site registration, so it is difficult to reissue the registration card if it is lost.