BEIJING: Discussions in Beijing about North Korea are always frustrating. It’s not so much due to the sharp divergence in US and Chinese thinking about how to deal with Pyongyang; the two sides differ on many issues. No, the real problem is the illogic of the Chinese position; at least from a US perspective. Indeed, it would be hard to create a policy toward North Korea that does more damage to Chinese national interests than Beijing’s current approach toward Pyongyang.