《晋书·志·第十九章》
刘歆认为： 国家主山川，山崩河流干，这是亡国的征兆。 
刘歆以为： 国主山川，山崩川竭，亡之征也。 
 Liu Xin believed that: A country is dominated by its mountains and rivers, when mountains collapse and rivers dry up, this is a sign of the country perishing.