Huawei has its own, of course it uses its own.
In the chip of Si, the CPU and GPU cores use the public kernel of ARM (not only the instruction set authorization), and there is currently no ability to design the original CPU and GPU cores. Yu Chengdong said Hisilicon developed its own CPU core, which is better understood when the business strategy.
Hisilicon chip design, simply referred to as chip integration design, the CPU, GPU, ISP, NPU, baseband and other cores integrated into a chip, its advantage in chip integration.
Longson's development model is self-developed kernel, of course, the instruction set and architecture need MIPS authorization, but the kernel is written by itself, and the intellectual property (IP) of the source code belongs to Longson Zhongke, which is different from the CPU and GPU property of the Kirin chip belonging to ARM.
Or because of ecological problems, the ecology of Longson architecture is not as perfect as that of Android.