I've got a Chinese all-in-one controller on one of my machines. It's a Newker brand and looks quite different to yours, so I doubt there's much in common that would be of any use to you.

One of the main issues was the incomprehensible Chinglish in the manual. They normally use a machine translation (probably Baidu) and have little or no idea what garbage it produces. I ended up converting the original Chinese PDF to Word (free online via the Adobe website), then translating it using both Microsoft Word and Google Translate, to get the best of both worlds. The result was marginally better than their original and as I gradually got to understand WTF was going on, I augmented the wording with my own.

Have you emailed the manufacturer? You never know, you may get lucky.

What are you using to create your designs? Obvs that will have quite a bearing on what post you need. If anything, mine was (loosely) based on Fanuc but I had to create my own post. I do my CAD / CAM in Fusion and the post is written in Javascript, so any mods need to be done there if that's your workflow.