[Q] How to root opal china mobile

I have recently purchased china android phone (Opal S7562)
Model No. 6515
Android Version : 4.0
Baseband Version : MT6515M
Kernel Version : Android_2.6.35.7
RAM : 204 MB
Internal Memory : 210 MB

Please tell me how to root this phone. I want this phone drivers also.

Sorry for my bad English.