​​
When I execute command with out `file://` prefix.
```
okular /home/stardiviner/Org/Wiki/Thought/Data/Books/国学拾遗.epub
```
Still got same error:

When I rename the file to `kk.epub`.
Still error.

The output of command `locate`:
```

LANG=zh_CN.UTF-8

LC_CTYPE=zh_CN.UTF-8

LC_NUMERIC=en_US.UTF-8

LC_TIME=en_US.UTF-8

LC_COLLATE="zh_CN.UTF-8"

LC_MONETARY=en_US.UTF-8

LC_MESSAGES="zh_CN.UTF-8"

LC_PAPER=en_US.UTF-8

LC_NAME=en_US.UTF-8

LC_ADDRESS=en_US.UTF-8

LC_TELEPHONE=en_US.UTF-8

LC_MEASUREMENT=en_US.UTF-8

LC_IDENTIFICATION=en_US.UTF-8

LC_ALL=

```

[stardiviner]           <Hack this world!>      GPG key ID: 47C32433
IRC(freeenode): stardiviner                     Twitter:  @numbchild
Key fingerprint = 9BAA 92BC CDDD B9EF 3B36  CB99 B8C4 B8E5 47C3 2433
Blog: http://stardiviner.github.io/

On Sat, Aug 5, 2017 at 5:40 PM, Michael Weghorn <bugzilla_noreply@kde.org> wrote:
https://bugs.kde.org/show_bug.cgi?id=383155

--- Comment #2 from Michael Weghorn <m.weghorn@posteo.de> ---
(In reply to Michael Weghorn from comment #1)
> Some questions that might help to narrow down the issue:
>
> 1) Does this work if you use a "plain" file path instead of a URI, i.e.
>
>     okular file: /home/stardiviner/Org/Wiki/Thought/Data/Books/国学拾遗.epub
>

Sorry, I forgot to properly remove everything; what I meant was:

    okular /home/stardiviner/Org/Wiki/Thought/Data/Books/国学拾遗.epub

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