100% sure, 80%(GPA in college) is the minimum requirement 4 a lotta universities in CA.
Well, there r many students tryin' 2 transfer 2 other universities outta country, like Guessy.
So u dun need 2 worry bot visa.
Another thing like transferin' credits, it's university's call. We dun kno it.
The thing u gotta take care is just gettin' a good GPA in ur university and TOEFL.
BTW, as far as I kno,many universities' admission staff dun care bot ur Chinese College Entrance Examination(a.k.a Gaokao),even though u dun have enough score that makes sure u can attend in a national key university(e.g.Tsinghua Univ or Peking Univ,and etc.)
Speakin' of GPA&rankin' in H.S. if it is fine, everthing's gonna b fine, but if it doesn't,u need 2 let ur HS teacher do u a favor,u kno it,just change it....
Sorry I can't type in Chinese due 2 my freakin' PC.