如果申请了7月开始的OPT 一年， 是否OPT期间必须留在美国境内？暑期回国会受到限制吗？
-If your OPT has been approved ann you have aleady had a job, technically you can leave US temporarily during OPT and should be fine to return to US to resume your F-1 status and employment for the remainder of the period authorized on your EAD card. But I personally do not suggest you to travel if not necessary during OPT, espeically due to Covid 19.
If you don't have a job or job offer yet, you cannot leave US after your OPT is approved. By the way, you need to have a job or job offer within 90 days.
