請問8老師，我有一個朋友是工作簽證，有一個未成年的孩子，我想問一下，如果排期到了，他和孩子可以一起申請綠卡嗎？
-Yes. His kid can apply for the geen card together with him as his derivative.
還是必須他先申請綠卡，他的綠卡通過後再給孩子申請？
如果他的孩子在國內的話，那他可以和孩子一起申請嗎？
-If his kid is in China, then he can file I-824 for his kid to follow to join to get green card after he gets green card. This takes more time. So, his kid had better come to US to file I-485 together wth him.
還是孩子必須在美國？
還有一個問題，如果遞交的時候未成年，審批的時候成年了，那這申請還有效嗎？
-Depends on how old his kid and how fast his I-140 is approved.
