Download Android KitKat 4.4.2 stock firmware for Ainol Novo 9 Spark II tablet from here or from here. Download stock Jelly Bean firmware from here.
Firmware image file: jellybean_aries_qxga_le97_a2_140414.fw
Model： Ainol Novo 9 Spark II tablet
Image file size: 345 MB
Platform: Actions Semiconductor ATM7039
How to flash
Open Action Pad Product Tool
Click on Down button
Firmware will be uploaded on tablet
First boot will take some time.