“這麽多年一直沒事”不等於永遠沒事。你爸這麽多年每年都回國超過半年，有什麽具體原因？還是覺得中國舒服？舒服就別要綠卡麽。
那麽多次，總會有一次邊境官看不下去了，給他個警告。 你不能以為“這麽多年一直沒事”來想。
為什麽不申請回美證？
I Received “I-327 Advised” Notation – What Should I Do?
We recommend that you consider obtaining a reentry permit as soon as possible. Depending on the travel plans and how long the applicant will plan on staying in the U.S., there may be a number of filing strategies. We certainly recommend that a reentry permit is, at a minimum, filed before departing the U.S. so that during the next entry into the U.S. there will be a proof that steps have been taken to comply with the “I-327 Advised” notation.
