THE 539 DIARIES

除了前面提到的包牌、養牌技巧，最重要的還是挑牌技巧，以下我們來分享挑牌秘訣。In case you are eligible to file an I-539 application, you have to submit an application for extension of continue to be or improve of status just before your recent approved stay expires. Even if you are authorized for another status S