Yes, I found that there are HF version and regular version. According to the content of these two articles
https://github.com/KindleModding/WinterBreak/issues/2
https://kindlemodding.org/jailbreaki...m-a-reset.html
I used both the HF version and the normal version of Koreader, but they couldn't run properly; I tried both the traditional version and the Coplate version of Kual, but they couldn't run properly. So now, I don't know how to do it
Also, thank you very much for being willing to help me solve the problem
I don't quite understand the system logic of this BBS. It seems like I mistakenly posted a new post just now. Sorry