/usr/share/doc/ubuntu-keyboard-chinese-pinyin/changelog.Debian.gz is in ubuntu-keyboard-chinese-pinyin 0.99.trunk.phablet2+16.04.20160226.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/ubuntu-keyboard-chinese-pinyin/../ubuntu-keyboard/changelog.Debian.gz