ok...i don't know anything about Brazil but these are the things i would watch out for if bringing it from China to the USA
Game compatibility...NTSC or PAL? Might have to get all you games in China..
TV Compatibility...also NTSC or PAL? Might have to buy a Chinese TV??
Umm power compatibility? do they use different outlets?
And finally all the setup and other screens would be in Chinese wouldn't they??