Unhappy [Q] How to ROOT this phone?

I dont know the exact name of this device. It is a CLONE of HTC one. bought it from Shanghai. Help me how to root this?

In back panel it only written IMEI and Modelne

by antutu benchmark it is written as:
Brand: sprd
Model : 0ne
os: 4.1.0
cpu: arm7

android version: 4.1.0
android sdk version: 10(android 2.3.3)
kernal: linux bla bla......

plz anyone... help