There have always been rumors that Huawei was working on its own OS. Those have now been confirmed by the company, with Huawei CEO Richard Yu affirming that the Chinese monolith has a working mobile OS all geared up and ready to go, just in case.
https://www.notebookcheck.net/Huawei-confirms-that-it-has-built-its-own-proprietary-mobile-OS-just-in-case.414601.0.html