*Tested on android 6.0.1* !!!
1. First of all connect the computer and the joying device to the same WIFI.
2. Download and install the app *ADB-over-WIFI_v1.0.apk* from HERE.
3. Open the app *ADB over WIFI* and press *ENABLE*
4. Download and install the app *ADB-Wireless-(no root)_v1.2.apk* from HERE open it and click to show your ip.
5. Now download the root folder from HERE
6. Unzip the folder and run CMD.exe as Administrator.
7. Type it: install.bat ***YOUR IP ADDRESS***
8. Wait until script finishes and reboot your Joying Device.
9. DONE !
Credits: *gustden* thanks for the supersu folder !