在古典诗词中,诗人常常借助于用典来塑造形象、烘托气氛、创设意境,在最为经济的有限天地里,最大限度地融会深邃曲折的内涵。从典故的性质上看,有“举人事以征义”和“引成辞以明理”(刘勰语)。前者“为用事”,就是引用既往的故事,借此类比现实,或引发联想,使语意更丰盈、更深? In classical poetry, poets often use the script to shape the image, set off the atmosphere, and create artistic conceptions. In the most economical and limited world, the poet can maximize the integration of deep and winding connotations. Judging from the nature of the allusions, there are “elevating people’s affairs for the sake of righteousness” and “introducing words to clarify the truth” (Liu Yuyu). The former “for business” refers to the past stories. Using this kind of comparison to reality or igniting associations makes the meaning richer and deeper.