Not just RISC-V, when it comes to performance the Loongson CPUs (with the LoongArch ISA) are likely the most competitive -- the IPC of Loongson 3A6000 is around that of 10th ~ 12th gen Intel CPUs! And 3A7000 is coming soon.
Zhaoxin is China's answer to "what if we need a drop-in x86 replacement immediately?" It does not represent the frontier of CPU development in the country.