is it only for extension, or for initial application to this type of visa as well? What about bank statements from abroad, they don't consider it?
is a one way reporting, voluntary one btw, there's a form a financial institution will ask you to sign if they comply with FATCA and you sign it but voluntarily. There's no reporting from US towards other countries, only one direction, from countries to the US. As far as I know. (US will get tired of reporting all its financial accounts to all other countries
it's practically impossible, and US also would never do it, since it undermines national security... they'll do such thing only if they'll become a 3rd world country after war with China
lol, so China will get reports from all other countries into itself, but won't report its own people to other countries since nobody can force it to do so, just as example)