1. I learned B1 is for business purpose and B2 is for travel. I haven't found any business. So, my only option is B2, right?
-Yes.
2. How long does B2 visa last?
3. What documents do we need to submit if we apply for B2 visa in United States?
4. Is I-131 the correct form to fill in? Doesn't seem to me like the correct one.
5. Can anyone give the link for B2 application form? I searched, but didn't find the correct one. I also found a link like this https://www.visapro.com/signup.asp. , but not sure if I need to proceed. This is a company webpage, it seems to me.
6. How much is the fee?
-Do you want to change your status to B-2 within US or apply for B-2 visa stamp in the US Consulate outside US (e.g. in China)? These are two different things.
If you want to change your status to B-2 within US, you need to file I-539 to USCIS. See this website:
If you want to apply for the B-2 visa in China, then you need to check the website of the US Consulate in China.
