/usr/lib/x86_64-linux-gnu/libfcitx-gclient.so.0 is in fcitx-libs-gclient 1:4.2.8.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfcitx-gclient.so.0.1
/usr/lib/x86_64-linux-gnu/libfcitx-gclient.so.0.1