Democracy and freedom are global waves, a tide that nuclear weapons, submarines and missiles are powerless to resist. The world trend is a mighty force, and those who go with the flow will prosper even as those who oppose it will suffer. China claims to be a "responsible big country", thus it should not countenance continued militarism in Pyongyang. Taiwan is the one country most capable of leading China to democratize, then going on to pressure North Korea to democratize. See the Charter for Permanent Peace and Development.