College students can't join the party without joining the League, just as you can't live directly in 2022 and 2023. You can apply to join the league at the university first, and then consider applying to join the party after joining the league. To join the party, you must first become a member of the Communist Youth League, and then apply to join the party after a series of examinations and studies in the school. After applying, there will be a series of processes to see if you are suitable to become party member, and the process of becoming party member is very long and complicated. This has nothing to do with the teacher's recommendation, and you are not qualified to let the teacher recommend you. Join the league first.