/usr/lib/x86_64-linux-gnu/libfcitx-core.so.0 is in fcitx-libs 1:4.2.8.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfcitx-core.so.0.3
/usr/lib/x86_64-linux-gnu/libfcitx-core.so.0.3