EMUI 6 is being tested on the Huawei Mate 9. The latest version of Huawei's skin is based on Android Oreo and brings a slew of improvements to the software arm of the device. The Mate 10 will launch on October 16 and is expected to run on EMUI 6.
https://www.notebookcheck.net/Android-Oreo-currently-being-beta-tested-on-the-Huawei-Mate-9.257504.0.html