1. First of all, you need to contact your former high school to see if there are any records of the league members. You can contact the Youth League Committee of the former high school or the responsible teacher and ask for the league members' files.

2. Secondly, the former senior three students have league members' files and can apply. Need to provide identification and application materials, so that the original high school can transfer to the league file.

3. Finally, once the league members' files are obtained, they need to be taken to the Youth League Committee or the department of the university to handle the transfer procedures of the league members' relations. You need to fill in the application form for the transfer, and submit the league members' files and supporting materials. The University Youth League Committee or Department will review the application and handle the transfer procedures of the league membership.