Search for "Mstar firmware tools" to see the scripts used to unpack and repack the code. how to dump the firmware using hardware tools, or are you looking for a specific version of the software to fix a device?
To get the most accurate firmware for your ZJBox, I need to know: zjbox firmware
That should cover the main points. Time to structure it into an article with the sections outlined. Search for "Mstar firmware tools" to see the