Here is an Android 4.2.2 Jelly Bean rooted firmware for the PiPO M9 PRO (aka Max-M9pro) for both WiFI and 3G models. This custom firmware is based on new official update version 1.0.7 dated 2013/11/20. 

(update_M9pro_OTA_1.0.7_20131120.img / M9pro_software_3G&WIFI_english version)

Revision history from the manufacturer:

1. increase hide the status bar features 

2. HDMI output occasionally interrupt signal to modify the phenomenon. 

3. Replace pipo launcher apk new version and the corresponding

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.

Build information:

Kernel: Linux version 3.0.36+ (root@alex-System-Product-Name) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #371 SMP PREEMPT Tue Nov 19 20:51:55 CST 2013

Android 4.2.2 JB: rk30sdk/rk30sdk/rk30sdk:4.2.2/JDQ39/eng.root.20131120.141257:eng/opinions-on-teclast-p90hdst-keys

ro.rksdk.version=RK31_ANDROID4.2.2-SDK-v1.04.00

Custom firmware features:

• root with latest SuperSU version 1.75 (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
• kernel modules (cifs, tun, lan, serial, xpad) compiled by Oma & Crew RKTablets, thank guys!
• NEW!  optional ClockworkMod (CWM) Recovery easy install package

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 to refuse any update pushed OTA.

Download: kasty-pipo-m9_pro-422-ota_107_20131120-rooted4.zip

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