現在F1學生簽證的有效期延長至5年，是否意味著我最多可以在美國停留5年，即使我的學習項目已經結束？

當然不是！F1學生簽證的有效期并不是由簽證的失效日期決定，是以在美期間所持學生身份的狀態所決定的。這包括你所有科目的學習時間、獲準的課外實習的所需時間，加上學習項目或實習結束后的60天，而你必須在這60天內離開美國。如果你的學生身份在學生和交流訪問學者信息（SEVIS）系統里顯示失效，那你的學生簽證也就無效了。

Now that F1 validity has extended to 5 years, can I stay in the US up to five years even after completion of my program? NO! Your F1 visa validity is not determined by your visa expiration date. It is determined by your duration of status as a student, which includes the full course of study and any additional periods of authorized practical training, plus 60 days following the completion of the study or practical training within which to depart the US. If you are not active in the SEVIS system, then your student visa is invalid.