I'm surprised that nobody ever tells about Loongson

China already produces government and business computers with their homemade LoongArch architecture. The run on homemade Linux as well. Their point was not only to not be worried as much about backdoors and sanctions, but also to get a platform that their own universities and engineers can maintain and develop

This brand used to coproduce with the French, open source and Java apps work, it's under US sanctions for supplying the chinese government and military, export was restricted so that none land in Russia.

It took decades to make, commercial value is uncertain, but they did master the entire computing stack now