To investigate the creation of classical poetry from the macroscopic angle, the aesthetic intension of "taking nil as existence" is not confined to "no wrds but meaning implied" on the relation of words and ideas.

The thought of agricultural science summized by Confucianists prior to the Qin dynasty which mainly contained:"plant crops according to soil","act on the laws of nature","harness soil in order to bumper harvest","apply fertilizer properly"etc,is valuable for us to cherish.