If this is true, then China has detected it from across their border. So much for China not putting up the North Korea soiling their nation.
Seems to me you could’t have this level of a problem without it being detectable from a distance.
I’m sure you’re right.
China has to be keeping tabs on radiation levels and it’s only common sense that the levels are high.
Still, China has kept quiet about it.
China’s reaction (or non-reaction) would certainly be different if the prevailing winds in North Korea were NOT away from China as they are.