The main reason is because partition system of perist anomalies as long as to brush perist partitioning can solve
All the tools used are put into a network backup the

Now describe the brush into the simple steps
After downloaded file
1. The brush into the third party rec
Mobile phone into fastboot mode, turned off the volume - and power key
Used after entering coffaceToolV1.2.1 tools brush into the third party rec
2. Will persist image file copy to the tablet
Tablet into rec mode, turned off the volume + and power key
3. Choose to install - "img mirror after selection persist partition -" mirror choose forgot is first selected image was first selected partition brush please according to actual condition choose
Brush into the can
Neutral induction is normal after restart the tablet

A network backup link: https://pan.baidu.com/s/1CIoU1xp1fih1DLu46t3OBA
The extracted code: c1h1