I have a china phone and it has a quadcore processor. Now how do i figure out what chipset,processor it has and which roms is it compatible with????
There's a bunch of system info apps available on the markets. Apart from those monitoring resource usage are also some showing you details on the hardware components, such as Hardware Info and System Info Droid:
These two should tell you everything you need – except for "which roms is it compatible with". That's always hard to tell if you don't know the exact name (and sometimes even if you do).
Download this one - Droid Hardware Info. This is the best one for newbies. You can find more apps similar to this by searching in Play Store. Your search string can be 'Device Hardware'.