/usr/lib/x86_64-linux-gnu/libibus-qt.so is in libibus-qt-dev 1.3.3-1build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libibus-qt.so.1
/usr/lib/x86_64-linux-gnu/libibus-qt.so.1