863211老師，
非常非常感謝您的指導。我會和學校international office聯係。在您的回答中，我有幾點不明白，請指點：
1.我是否還需要申請J-1 category from J-1 researcher/scholar to J-1 stduent??
-If your old J-1 category was J-1 student, you need to to J-1 transfer. ？？？
-------------I don't understand the answer,could you give me a favor to explain it?
I really appreciate your patience and help!!!
如果可以以J-1身份讀書，sponsor的單位應該是誰？
-It is the New school and you need to get another DS 2019 from your new school.
---------------------我仍然隻需要waiver一次，即使拿到新的DS2019,我的理解對嗎？
再次感謝。
