First of all, Thank you everybody for your suggestions and help!
The reasons for me to posted the message here are:
1. get helpul suggestions from various sources;
2. share my experience with you to avoid the same problems that might happen to you;
All discussions are very helpful. Some said, this is one party's words, I understand that. But I, sweare in God's name, everything is true and I never even touch her a finger in any circumstances. I have been helped her for setting down in the States, teaching her English, never pushing her to make $$ for the family. But She has been chatting with other guys all the time during the marriage. She is cheating me and other guys too, and meeting guys. I try very hard to pretend not knowing what she is doing so that not mess up with my final decision. She may think I am a fool, and believe what she said. I still treat her very nice when she is doing bad in my back. I thought she might be impressed by what I have been done for her and change her behavior. But she keeps doing what she planed. Sorry I can't list details here because someone might her guys. If happened you were the guys, please don't be fooled since she lied things about me to get your sympathy. One day, you may face the same problems I have now. From this point, I believe she is smart and very skillful. I just can't image she can lie as it is true.
I value everyone's suggestion. XBT and others, I doubt she could use any thing to against me in the court; but I do concern how much she could get from court. Does her immigration status prevent her doing something bad to me? She doesn't want to even visit China!
for earlier discussions:
http://web.wenxuecity.com/BBSView.php?SubID=immigration&MsgID=366950
Welcome you send me "QQH"!