/usr/share/doc/gnome-getting-started-docs-zh-tw/changelog.Debian.gz is in gnome-getting-started-docs-zh-tw 3.18.2-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gnome-getting-started-docs-zh-tw/../gnome-getting-started-docs/changelog.Debian.gz