Abstract: As is recorded in Shang Bo Er·Zi Gao theinner structure of the heaven-induced-life myths of the 3 first ancestors of Yu,Xie and Houji may possibly have a corresponding relationship with the evp;itopmaru strictire pf tje 3-gemeration outlooks on mandate of heaven. The myths of the heaveninduced lives of the 3 first king ancestors indistinctly convey the meaning that the dynasties of Xia, Shang and Zhou,in authenticating the legality of their powers might deliberately contrive on interpretation that the Yin Dynast was closer to the intention of heaven’s mandate than the dynasties of Xia and Zhou.It might be an inevitable outcome of an involuntary choice in authenicating the legality of dynasty substitution in the same conceptional paradigm of the mandate of heaven.Therefore,they may be understood as political metaphors serving the authentication of the legality of dynasty powers.

Key words: myth of heaven-induced life, mandate of heaven, 3 generations, Zi Gao