@lucksufe Are you using Armbian or ophub images? If the later then you need to ask your build question in the ophub pages as they are an unrelated fork of Armbian.
Given what you have said above, you are following instructions for Amlogic TV boxes which have nothing to do with your rockchip based box. Do not follow those instructions.
Why are you expecting the panther-x2 image to work on your box? Each box is different and generally needs an image specific to that hardware.
If you are using an Armbian image, then @maka stated you should be able to write the image to an SD card, put that card into a linux machine, edit the files you are talking about and then move that SD card to your box and boot.