She er fu shi, said by Jingjiang,the mother of Wenbo of Lu, points out the functions and fashions of assigning duties during communal worship,which can serve as the entry point for observing the working of the system of duty assignment. The increasing functionalization and lyricization of the assigning of official duties and government affairs in the administrative system of the Zhou Dynasty had contributed to improving the fu fa (rhapsodical technique). The fu na yi yan (heeding verbal advice)tradition recorded in Xia shu (Book of Xia) emphasizes the artistic quality of fu yan (the use of words in rhapsody). Therefore, how the assigning of official duties and government affairs had contributed to the emergence of fu fa and fu shi (rhapsody)is an unignorable historical context for the studies of the formation of fu fa.