之前的concern 是因为人在中国出差,学校不肯给递交OPT申请,说一定要人在美国才行。
-The school is right. You can ask the school to issue a new I-20 to you to apply for the F1 visa if your old I-20 expired. If your old I-20 does not expire yet, you can use it to apply for F-1 visa. After you return to US, you can apply for OPT.