四岳
Mythologist Yang Lihui sees Four Mountains as four gods of a set of four mountains, with Four Mountains referring to the actual mountains themselves. K. C. Wu sees Four Mountains as being a ministerial position established by Yao to "oversee the mundane affairs of the empire", but points out that a real description of the functions of this position is lacking, nor is it certain whether there were one or four persons holding this ministerial position; however, he goes on to say that the evidence suggests the existence of four of them, and that they were charged with keeping themselves knowledgeable about what was going on throughout Yao's domain and advising him upon request. The importance of Four Mountains can be seen in the key role of selecting Gun to be the first to be put in charge of controlling the flood, then, later, in nominating Shun to be Yao's co-emperor, and later successor. Anne Birrell says that Four Peaks (alternate term for Four Mountains) is a "synonym for [the] ruling nobility of the four quarters of the world in the archaic era; also four mountains" (Birrell 1993, 300).