[Q] chinese mobile model S85 rooting

Hi guys
I buy a chinese mobile with Android installed which has the following information:

Model : SGiFe S85

BB Chip: MT6575
MS Board: haocheng15_6626_gb2
Kernel Ver.: 2.6.35.7 (release@release09)

I try many ... many tools to root it like SuperOneClick for example but all the tools did not work and it is still unrooted :crying::crying:
My question
Is there a method or a way to root it manually or Is there a tool that works with this model


Best Regards
And thanks in advance