先谢谢八老师！关于最后一条，想再确认一下，只要有有效签证，孩子符合不符合CSPA对其入境拿绿卡没有影响，对吗？
-Correct. The child has no age-out problem, otherwise he/she would have not got the immigration visa, i.e. age-out problem only occurs before filing immigration visa application or before filing I-485.
另外，申请白皮书到打指纹通常要多久？
-One to two months, case by case.
批准前回国有问题吗？
-No problem. But had better do the fingerprinting before leaving. Otherwise, he/she needs to return to do the fingerprinting.
加急办呢？
