We already told you about the fifth Thinkpad X1 Carbon generation a few weeks ago, when the laptop first leaked with most specs. Shortly before the new year started, Lenovo itself provided us with more information by leaking the new Thinkpad once again.
http://www.notebookcheck.net/Lenovo-Thinkpad-X1-Carbon-2017-leaks-once-again.189735.0.html