How to root Sansui SA32 - android 2.3.5

[surendir]

My mobile Android 2.3.5 - Sansui SA32

Device
Device: AndroidPhone
Model: SANSUI SA32
Board: sp6820gb_s820v21
Product: sprdroid_base
Brand: SANSUI SA32
Manufacturer: SND
CPU+ABI: armeabi-v7a
Bootloader: unknown
Radio: unknown
Hardware: sp8810
Release: 2.3.5
SDK: 10
Type: user
Build: W22.20_P20
Locale: en_US

System
System
Kernel: Linux version 2.6.35.7 (app3@e3srv1) (gcc version 4.4.3 (GCC) )