Xiaobaitu, Thanks a lot for answering my question.More question:

来源: 于 2007-05-21 22:54:47 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

When I go back to apply visa, I need to use Original I-797, it is the first one and the only one I received so far as a receipt for my application, or you mean there should be another I-797 for approval of my case?
Thank you very much!