China's ongoing tussles with the United States over issues including Taiwan, Tibet and trade are in a sense nothing new. For more than two decades, Sino-US relations have periodically gone through rough patches over these and related causes of disagreement. What is new is China's much-enhanced global clout in the wake of the world financial crisis, which is coupled with a marked decline in America's hard and soft power.
More importantly, the Chinese Communist Party (CCP) leadership is gunning for a paradigm shift in geopolitics, namely, new rules of the game whereby the fast-rising quasi-superpower will be playing a more forceful role. In particular, Beijing has served notice that it won't be shy about playing hardball to safeguard what it claims to be "core national interests".

