(In reply to comment #11)
> Sorry for the delay!
> 
> In answer to your question :- 
> 
> Was the locale set in the environment before starting syncevo-dbus-server?
> See "strings /proc/`pidof syncevo-dbus-server`/environ | grep zh_CN".
> 
> No locale was set in /etc/***/environ

That doesn't quite answer the question. Even if nothing is set in /etc, the
process might still get spawned with the right environment variables. To be
absolutely sure, please run the "strings" command above.