Thank you
The progress bar reaches 100%. Now using koreader is almost no different from the native reader. Except for one thing.
If you open a book but do not read it (by accident, for example), the library will say “0% read”. And this message cannot be reset.
If you repeat the same steps with the native PocketBook reader, there will be no message in library. It only appears if you scroll through at least one page. And disappears if you return to the first page (book cover)