请问8老师，我有一个朋友是工作签证，有一个未成年的孩子，我想问一下，如果排期到了，他和孩子可以一起申请绿卡吗？
-Yes. His kid can apply for the geen card together with him as his derivative.
还是必须他先申请绿卡，他的绿卡通过后再给孩子申请？
如果他的孩子在国内的话，那他可以和孩子一起申请吗？
-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.
还是孩子必须在美国？
还有一个问题，如果递交的时候未成年，审批的时候成年了，那这申请还有效吗？
-Depends on how old his kid and how fast his I-140 is approved.
