I think the Chinese realize they don't need an EMP attack. They currently have a DJT attack on America that has done more damage than they could ever imagine! Haha crack me up!
Mutual Assured Destruction still rules; here's why.
N. Korea is the example, but it applies equally to any of the 'usual suspects' as the source of an attack could not be hidden for long.
Which country wants to wonder when and what is coming from beneath the ocean's surface, where American missile subs, just one has enough megatonage to destroy any county, would easily survive the pulse, and surely launch.
All potential EMP combatants know that.
Here's what would happen if North Korea hit the US with an EMP that could take out 90% of the population
The nuclear infrastructure the US would use to respond to such an attack has been hardened against EMPs. As soon as the blast in space was detected, US nuclear missiles would streak across the sky and obliterate North Korea.
Additionally, a North Korean bomb detonating in space wouldn't just hurt the US electrical grid, it would destroy all nearby satellites. Chinese, Russian, Japanese, and other satellites would become useless. The resulting EMP blast would fry electronics all over the western hemisphere in a truly international attack against humanity.
Not only would the US retaliate, but the attack would likely turn the world against North Korea, creating unprecedented international support for the use of force against its leader Kim Jong Un.