National Supercomputing Center Zhengzhou
The bans may not impact the Sunway TaihuLight supercomputer, Earth’s mightiest computing machine as of 2016 according to the Top 500 list. The machine was still the fourth-most-powerful computer on the planet as of November 2020, thanks to its 10,649,600 processor cores, described in our sibling site
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Each processor has 260 64-bit Sunway RISC CPUs designed in China, and the machine resides at the National Supercomputing Center Wuxi.
Plenty of other Chinese machines on the Top 500 list use Intel silicon, and it is highly likely that US companies have contributed to some parts of other supers in China.