The Huawei Mate 9 was updated to support Project Treble on its Oreo beta. A user on XDA-Developers has successfully installed and booted a generic version of AOSP Android on the device in what may just be a groundbreaking event in the history of Android.
https://www.notebookcheck.net/A-generic-AOSP-ROM-booting-on-the-Mate-9-may-be-the-biggest-milestone-in-recent-Android-history.265110.0.html