If the 20-year war in Afghanistan was a “forever war” for the United States, then its competition with China must be “forever competition”, because it will surely last longer than twenty years. In the years ahead, China-US competition will most certainly intensify in that the US will take it as the last chance to bring down a rising power, writes Zhou Bo , speaker at the first session of the 18th Annual meeting of the Valdai Discussion Club, Senior Fellow, Centre for International Security and Strategy, Tsinghua University, Expert of the China Forum.…