Quote Originally Posted by Ser Clegane
Since North Korea has been talking about the planned tests for several days now and since it has been all over the press there was certainly plenty of time to move troops.
I assume that the 20 minutes advance notice for China were only about the exact timing when the test would happen.
Well, that's a fair point, except that the North Koreans were putting the timeline at within the next month, not a couple of days.

Is it your contention that China has done anything let alone enough to curb the DRK's nuclear amibitions?

The way I see it, China is a patron, and in many ways, North Korea is a satellite state of China. Either 1) China privately allowed this test while publicly playing along with the international community or 2) they have absolutely no influence, despite their claims to having a relationship with Pyongyang.

I suspsect that it's 1. As they've actually not done anything to slow North Korea down, and have done quite a bit over the years in terms of vetoing and blocking penalties, China bears the bulk of the responsibility of a nuclear armed North Korea, even if the correct answer is 2).

Regardless of whether China wanted North Korea nuclearly armed or not, their behavior over the past decade has all but guaranteed it.