After nearly a month of belligerent bluster from North Korea, China appears to have had enough, ending its silence about North Korea's brinkmanship and suddenly roaring its disapproval of its ally's reckless threats. China's exceptional tough talk does not necessarily mean that it intends to abandon Kim Jong-un's regime; but, at the very least, it does suggest that a radical shift in China's policy towards North Korea might no longer be unthinkable.