When chicoms unleash the takeover on Taiwan, hell will unfold. I can see some EMPs in our sky and internet attacks designed to wreck havoc in all current communication paths.
Outside of Korea, the Chicoms have never been engaged in any major-time-length war with anybody.
So, they say they have fighters and bombers and such, but not since Korea, have they been pitted against the rest of the world..so they don’t really know.
EMP is extremely short lived. It will probably disrupt most radio communications but only for a few minutes at most.