Huawei has commenced rollout of Android 9 Pie-based EMUI 9.0 to older flagships such as the Mate 9 series along with the Nova 2S in China. The rollout is happening as per expected timelines and should hit users in China this week followed by a global rollout shortly. Alongside the Mate 9 series, the Huawei Nova 2S, the Honor V9, and the Honor 9 are also getting their taste of Android Pie.
https://www.notebookcheck.net/Android-9-Pie-now-heading-to-Huawei-Mate-9-series-and-Nova-2S.411013.0.html