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Beijing is clearly irritated with the antics of Kim Jong-un, but probably not enough for China to revise its national interests and bring the young monarch of Pyongyang to heel. Beijing likes the current setup of a divided Korea with Kim's Pyongyang regime providing a buffer between its northeastern border and the American ally South Korea. But with China experiencing a fast-growing economic relationship with South Korea, the equation in northeast Asia between Seoul, Beijing and Pyongyang is a dynamic one. While some interests of the three governments coincide, others do not.