863211,
I appreciate your advices.
You had better address why you want to study after you finish your J1 program, e.g. why you want to seek a higher degree (Master or Doctor)-importance to you, and convince the VO that you will return to China after you finish your F-1 study.
----------My university's support documents and work certificate and payroll.But I am not sure whether I could get it or not.If it is unlucky,what could I do?
----------My family in China. Marriage certificate and family photos. Do you think My hu*****and need to visit us when we still in US.Because he did not visit us during the past 2 years.I really worried about it.
----------What documents need for my son?
----------Financial support from the F-1university.
Do you think the above documents is ok?
I am very grateful for all your patience and help.