Yes, freshmen need to get sealed files in the old high school and open a letter of introduction before they report for duty, and they need to be handed over to the University Youth League Committee for organization at the beginning of the university. This process belongs to the transfer of group relations. Without this step, the university will be regarded as a member of the group if it does not receive the files and letters of introduction from the group. I'm going to join the group in the organization department again.