Original Jiayu G2 recovery image is broken and cause problems when doing a ROM update via TF card. With this recovery image, you will not have such problems. Zip file contains several recovery image files for different versions of Jiayu G2. I’ve just copied the correct version for G2H into official ROM folder replacing original one. Then used SP Flash tool to flash whole ROM (4.1 Beta version from Jiayu). You can try other methods as well. It should also work if you put image file in a folder with scatter.txt file from original ROM. Then flash it using the SP flash tool, deselecting all options except RECOVERY.
Here is the file for download:
[hide]update_autorecovery5.zip[/hide]