The sovereignty dispute in both East and South China Sea are continue expanding since 2009. Whether China will show its dominance in the region? Will the US demonstrate the forces to show its world hegemony determination and the maritime order maintained? All these questions are the deeply concerned for the schooler of international relations. There is no consistent or even convergence of views for “China rising”, it is good or not, just depend on the theories which people used. This article will try to starting with geopolitical factors, observing and competing for several core forces in the East Asia region. Trying to figure out the current geopolitical and strategic factors, to show the power competition in East Asia.