"It was in Beijing's security interests to maintain a comfortable position in a strategic triangular relationship with the Soviet Union and the United States. When the Soviet Empire and the East European communist regimes collapsed, the structure of the postwar international system dissolved, and the old parameters for Beijing's security strategy disappeared. The Chinese leadership suddenly found itself in a totally new world in which China needed to reorient and redefine its security strategy on a new strategic axis."(Quoted from site)