your private message box is full...I can't send PM to you ...so I paste it here
and sorry for late reply...
I am busy for my assignment these days...
Actually, I don't know the standard of selecting new students in US universities ...so I can't give you any concrete suggestions...
I know the students from CCER are very welcomed by universities and they always get many offers...
It seems you need high GPA..strong background of math as well as researching...and reputation of your undergraduate school..
so try to do as best as you can...
I think that you also can try some universities this year...maybe some surprise...
Good luck