China has no choice to engage militarily. They will have to enter NK and establish their own DMZ to contain the border to stop the flood of refugees. I don't know how far south they're willing to go. I have to believe that China wants to limit their exposure to NK - the more they own, the more problems they inherit.

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Jonathan

2011 Mazda2
2000 E320 4Matic Wagon
1994 C280 (retired)