8老师好
我姐姐（美国公民）2011年底为我申请了F4兄弟姊妹移民递交I-130表格，后收到I-797C的确认，其上“RECEIVED DATE Jan 06，2012”，当时我儿子15周岁4个月。
直至目前，没有收到任何批准的文件，现在看，还有5、6年才能排期到我们，届时，我的儿子大约28岁左右。
我的问题：
1 他可以按《儿童身份保护法案》的相关规定，享有随行子女移民资格吗？
-Depends on when the I-130 will be approved.
The child's CSPA age = the child's actual age when the I-130 priority date is current (排期到时) - the I-130 pending date
Note: the I-130 pending date = the I-130 approval date (i.e. the approval notice issued date) - I-130 receipt date
If the child's CSPA age > 21, then the child is age-out and that means he cannot immigrate into US together with the parent (i.e. cannot use the immigration benefits as the drivative of the mother).
2 以上如可，他必须一直保持未婚状态直至拿到移民签吗？-Yes. But if he is age-out, then it does not matter because he cannot use the benefits no matter whether he gets married or not in this case.
盼百忙中拨冗给予指导，谢谢。
