/usr/share/dbus-1/services/com.ubuntukylin.session.service is in youker-assistant 1.0.1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=com.ubuntukylin.session
Exec=/usr/bin/youker-assistant-session.py
|