老人已經買了7月底回中國的飛機票。
聽說現在辦回美證要好久，如果現在提交是不是來不及了？
-After they conduct the biometrics, then they can leave US. Then, you can mail the reentry permit to them. If they will leave urgently, they may request expedited processing for biometrics appointment which takes about 10 to 14 days. See this link:
