回复：回复：Yes for the dependent child.

谢谢大师 !! 你是说， 如果交I-485, 对孩子年龄的要求是summit form i-485时 < 21?

-Correct.

如果 Consular Processing is Employee Base, 对孩子年龄的要求是interview 时 < 21?

-I guess what you means is that your child is doing following-to-join (you file I-824 for your child) using consular processing. If so, it is the time when your priority is current and you filed I-824 对孩子年龄的要求 (CSPA age) < 21, not inetrview时.