Download Android Lollipop 5.1.1 stock firmware for F86Q tablet

Download Android Lollipop 5.1.1 stock firmware for F86Q tablet from here or from here. 

Firmware details
Archive: rk3126_5.1_f86Q  _zhongx_1024x600_gc0308_gc0312_gc2145_rtl8703as_V003_20150812
Firmware image file name: update.img
Platform: Rockchip RK3126 
Archive size: 277 MB

Boot version: 2.25
Firmware version: 5.0.02
Build number: rk312x-userdebug 5.1.1 LMY47V eng.keww.20150812.164258 test-keys
Model number: rk312x
SDK version: RK30_ANDROID5.1.1-SDK-v1.00.00