After a brief lull, North Korea has begun acting up again: Kim Jong Un has vowed to re-start the country's nuclear program, has declared the near-60 year-old armistice between his country and South Korea "void", and, in his latest provocation, has prevented workers from the South from entering the jointly-owned Kaesong Industrial Park, once a symbol of hopeful reconciliation. And so the usual cycle continues: Pyongyang rattles, Washington steams, and Beijing expresses "regret" and "hope" for peace on the Korean peninsula.
China's reticence in dealing with North Korea is, in a way, puzzling; After all, Beijing isn't shy in protecting its national interests in the East China Sea, standing up to countries like Japan and the Philippines. China is also North Korea's only ally and, according to the Council on Foreign Relations, provides 90 percent of North Korea's energy imports, 80 percent of its consumer goods, and 45 percent of its food. If China suddenly decided to cut ties to its mercurial neighbor, North Korea would almost certainly collapse.