-Complete the Form I-485 and provide the necessary documents such as marriage certification, physical exam, birthdate certification, etc. (see the instruction of Form I-485 in USCIS website) and send these documents along with the copy of the receipt of your spouse' I-485 to USCIS where your spouse' I-485 was filed.
小孩5歲,是否也要提交單獨的485呢
-Yes, the same as you.