If the threat wasn't specifically DPRK, but something that really forced me to leave, I would also have to consider family which includes Chinese wife and a child (who is currently infant).
Furthermmore the kid currently doesn't even have ID or hukou yet, much less foreign passport, so it really depends on how fast we'd need to depart.
But given time to spare, our initial choice would obviously be to return to my home country in Europe since there we have at least some safety nets and easiest way to arrange residency for whole family. But I wouldn't have that as long term option.
In Asia-Pacific my preferred destinations would be Malaysia or New Zealand.
Work-wise I get revenue from abroad. We are just registering business in Kunming to remodel that revenue, but if we'd have to leave, we could just reregister anywhere else and keep going - which would also help to get residency pretty much anywhere affordable without finding new job.
Given threats that could force us to leave Kunming, I'd rate major earthquake higher than anything else - if we'd survive it.