請問：自己是公民身份.父母在美１０年B2簽證已經入境４個月了，希望能夠再繼續呆半年，聽說延期成功率不大，是嗎？
-Not true.
如果，為了拖延時間，把材料遞交上去，以求pending期間合法停留，是走５３９延期，還是走申請綠卡道路？哪個成功率大？
-If they don't want to stay in US permanently, they just need to file I-539 to extend their B-2 status. But if they want to stay in US permanently, then you may sponsor their green card.
非常感謝
