The new system uses a custom interconnect format to link its nodes, and there's a custom Linux variant that serves as its software foundation. The technology isn't especially exotic (the interconnect is based on PCI Express), but it doesn't need to be to achieve a breakneck pace. It's even more power-efficient than Tianhe-2 at a relatively modest 15.3 megawatts of energy consumption.
The irony? As Top500 says, a 2015 US embargo may have helped TaihuLight's chances of claiming the top spot. Many expected Tianhe-2 to get an upgrade to Intel's Xeon Phi processors and push 100 petaflops, but the trade restriction prevented that from happening. The embargo also persuaded China to step up its processor development, so any successors to TaihuLight might be that much faster. Having said this, TaihuLight may solve engineering and science problems for everyone -- we're not going to knock a supercomputing breakthrough if it's useful well beyond its native soil.