For your situation, I said usually J is three years.
如果是H1,短期三個月。是在H1的簽證有效期結束後就要離開美國嗎?
Yes.
You mean the period is three months or I have to leave the country when the visa is expired?
I think Xiaobaitu will say Yes.
還是可以待多長時間?
10 days no gap.
10 days after the the visa expired?
Yes. But if you are in the processing of getting H1b or others, you can wait for a certain time
工作合同有多長就待多長,是嗎?
No. One period is three years.
you mean the H1 visa lasts three years??
Xiaobaitu have answered your question.
回國就要再辦簽證?
It is up to different situation.
in what kind of situation, I don't need a visa to come back to US?
If you are within H1b visa valid time, or if you get AP after you are pending for 485
H4簽證的準備和J2有什麽區別?那個更好辦?
I think it is almost same thing. J is a little faster.
公司打算讓我幹幾年,J1和H1哪個對我和家人更好些?
J does not need to pay tax. For GC, H is better.
do not need to pay tax? is it better for the company?
what is GC? :P
You do not pay the visa.
GC is the card which some people like to show off when they stay in America for a certain years.
Anyway, you are welcome to this forum, and you will learn a lot.
By the way, in China do you really can enter wenxuecity?