The nation that plays a major role in the past crisis is China, the main ally of the North Koreans, who try to persuade both sides not to raise the tension. China's interest in keeping North Korea away from conflict is for practical rather than ideological reasons - if there is a collapse of the North Korean regime, the eventual unification of Korea would result in a strengthening of North American influence in a region close to its border. Moreover, the outbreak of a conflict would almost certainly provoke a movement of refugees towards the Chinese territory, which the government of Beijing seeks to avoid.