It seems that N Korea is more friendly with China .
So I assumed that N Korean nukes must have originated from China. But I heard on NPR today that N Korean Nukes are from Pakistan. Here is the story on NY times
Nothing in the link says North Korea got nuclear materials or warheads from Pakisan. They apparently got industrial equipment used in the manufacture of nuclear materials. And Pakistan got North Korean missiles, for convenient delivery.
Sounds like a straightforward business deal to me, even if in violation of international law.
N Korea has been marginalized by China for at least a decade. International trade does wonders, and South Korea are big investors in China. Heck even the Chinese think that N. Korea is run by a loose cannon that’s a few grains short of a bowl of rice.