If you look at the core count, you'll see a stark difference between the supercomputers in the West and China. For the same perfomance, a Western supercomputer

If you look at the core count, you'll see a stark difference between the supercomputers in the West and China. For the same perfomance, a Western supercomputer probably fills a room, and a Chinese one the whole datacenter. Add to that, that the physical distance plays a big role in lantencies, and China may be able to do supercomputer, but it is probably very expensive and inefficient for them. I have never operated or seen a supercomputer, so all of this is speculation on my part.