Here is an Android 4.2.2 Jelly Bean rooted firmware for the PIPO M7 Pro tablet based on latest update from Pipo dated 2013/12/05. This firmware is valid for the M7 pro in both 3G and WiFI models.

( update#80_M7pro_892_ota_20131205_v1.0.6.img )

Manufacturer revision history (translated from Chinese) :

1. increase fast boot function; 
2. increased the status bar hidden features; 
3. optimized UI icon layout; 
4. modify electronic photo frame error problem;

Build information:

Kernel: Linux version 3.0.36+ (root@alex-System-Product-Name) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #80 SMP PREEMPT Thu Dec 5 10:07:17 CST 2013

Android 4.2.2 JB: rk30sdk/rk30sdk/rk30sdk:4.2.2/JDQ39/eng.root.20131205.134750:eng/opinions-on-teclast-p90hdst-keys

ro.rksdk.version=RK30_ANDROID4.2.2-SDK-v1.00.00

Notes: 

- Certificate Center and original PiPO launchers have been kept in the firmware

- Certificate Center will ask for product key, which is not needed, just hit later and connect to Internet and it will be activated

- any update received thru OTA may interfere with our custom firmware, we recommend not to apply any OTA update.

- to hide the status bar, press the last button on the right from the status bar

From the hidden status bar to show it again: slide from bottom of the screen to the top.

- we have posted a short video about the Quick Boot feature 

Custom firmware features:

• root with latest SuperSU version 1.80 (free version)
• removed most Chinese and unnecessary applications
• Google Play Store fixes so more application are visible/compatible
• updated busybox v1.21.0.git (2012-11-29)
• Unix like init.d boot scripts support, more details on init.d scripts here
• changed permissions on external sdcard to allow write access
• increased space for applications (/data partition) to 4 GB
• disabled OTA updates (may cause problems, see Notes above)
• all launchers have been kept: stock Android, Kid Launcher and PiPO launcher
• kernel modules (cifs, tun, lan, serial, xpad) compiled by Oma & Crew RKTablets, thank guys!
• NEW! : optional ClockworkMod (CWM) Recovery easy install package

Download: kasty-pipo-m7_pro-422-ota_106_20131205-rooted4.zip

Flash with Rockchip Batch Tool version 1.7, use Restore button.

I flashed this firmware and verified it is working on a PiPO M7 pro test device (thanks sclstore.fr) Unfortunately, I don't have much time for extensive tests on this new firmware release, users feedback is welcome.