回複：F1->H1B來美九年,轉過學換過工作,第一次回國,心裏打鼓

1) All of your original I-20, I797 approve notice.
2) Continuous I-94 forms to show your legal status
in USA.
3) All of your original I-129 forms.
4) Latest 3 years tax returns and W2 forms.
5) Your employment letter from your current company with
the letter paper having your company title.
6) Latest 3-6 paycheck stubs.

Maybe you also need to prepare how to answer some questions that the VO will probablly ask you such as
transfer school and change jobs.
Good Luck!