From Ars Technica:

China producing x86 chips nearly identical to AMD server processors

Thanks to a licensing deal with AMD and a complex joint-venture arrangement, the Chinese chip producer Chengdu Haiguang IC Design Co. (Hygon) is now producing x86-based server processors that are largely indistinguishable from AMD’s EPYC processors—so close in design that Linux kernel developers had to do little in the way of patching to support the new processor family, called “Dhyana.” The server chips are being manufactured for domestic use only—part of an effort to break China’s dependence on foreign technology companies.