Ihor Radchenko <yantar92@posteo.net> writes:

> Ruijie Yu <ruijie@netyu.xyz> writes:
>
>>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=63029
>>
>> From my understanding of Eli's response, org-colview is at fault here, by
>> calling `length' instead of `string-width' in
>> `org-columns-add-ellipses'.  Changing this function call might be all it
>> needs to fix the colview test failure?
>
> This is tricky because string width may be different depending on
> in-buffer settings, fonts used, etc.
>
> We can try to be a tiny little bit more accurate using
> `truncate-string-to-width', `string-width', or `org-string-width'.

Just had a try at this, fully untested code (other than starting a
LANG=zh_CN.UTF-8 Emacs session and running this substring function to
see its effects).  It is a bit too late for me now, so I'll call it a
day (literally) for coding today.