Abstract: The term "geopolitics" is commonly understood as a particular mode of visualizing space,states,and the relationships between them.Geopolitical models always take the form of mapping by emphasizing the strategic importance of particular places.The principles of geopolitics,especially the heartland theory from Halford Mackinder,can be employed to analyze Chinese history,in which the territory suffered many times of splits and unification.Both the geographical pivot and heartland are in the Central...