How about the social security of the supernumerary staff in the mobile company before they become regular employees?

A written application for transfer and connection. If the mobile company wants to transfer social security, its handling process is that after the insured establishes the basic old-age insurance relationship in the new employment place and pays the fee, the employer or the insured submits a written application for the transfer and continuation of the basic old-age insurance relationship to the social security agency in the new employment place.