There is a difference between Kirin 990 and Hisilicon Kirin 990. They all come from the technology company Huawei. Hesse was a spare. Because Huawei has been suppressed by the United States in recent years, Qualcomm chips are not supplied to Huawei. Huawei can only use Hisilicon Kirin chips. This has indicated that China's domestic manufacturers must carry on the road of independent research and development. Now hisilicon has chips, it just doesn't have a processing plant.
Kirin 990 is Hisilicon Kirin 990, Huawei Hisilicon is responsible for the research chip, and Kirin just named the chip Kirin.