And since they aren't part of the world economy and can't be punished why should they care about the implications. And I spent time in Pyongyang and spoke with an Indian worker there. North Korea was running secret 4G mesh networks off their fibre optic network very early on so clearly what people see/believe isn't the reality.

Also, I think China is exceedingly unlikely to be the source here, especially when it’s been established the recent nuke technology came from the Ukraine.