Huawei only just launched its new Kirin 980 flagship SoC a few months ago, but the company is already working on its successor, the Kirin 990. This comes amidst rumors that the Kirin 990 may be a mid-cycle release in Q1 2019.
https://www.notebookcheck.net/Huawei-s-next-gen-flagship-SoC-the-Kirin-990-is-already-in-development.386551.0.html