Currently working in this company, I guarantee you Huawei is working on its own version of everything. Any tool we use is always considered as something we should aim to replace with a version of our own.
A custom OS does not suprise me in the slightest, considering there are custom ARMv8 CPU's in development as well
A custom OS does not suprise me in the slightest, considering there are custom ARMv8 CPU's in development as well