1. See top 1 post, you can file I-140, but you cnanot file I-485 until you get J waiver. 2.If your documents are ready, everybody can get approved. 3.4.5 three questions, you need to call Chinese Embassy Ms. Jinhua Xin to get all detail answers, number see top 3 post. After your calling, please post on this board, so other prople can underdtand.