Evaluating current situation in the East Asia, the foremost issue of concern is the Rising China and China`s leadership. The signs of Cheonan incident, Yeonpyeongdo crisis and East Japan crisis are over clouding the regional security. When the East Asia nations around the region perceive security recess, the region eyes on China, the first largest economy experiencing sustainable economic growth and holds the highest foreign exchange reserve in the world and the rising superpower took the leading role in the economic recovery. As such, the region eyes on China to see whether the country will step up and take the leading role as it did in 2008 if another such crisis occurs in 2011. But China must have been considered one`s political calculation in those critical moments. With that, what are China`s concerns and how would its leaders respond to the current East Asia situation? On a primary level, China is interested in its dollar assets and a slowdown in exports, also weaken their military power. China`s rapid economic growth and military modernization had changed East Asia`s power relations, challenging the predominant position of the U.S. and its role as regional balancer. However, China must have been know its own limitations by Cheonan incident, Yeonpyeongdo crisis and East Japan crisis.