1. This thesis tries to compare the two rhyme diagrams in the changing arranging and alliterations, and to illustrate the changing phonetic system that the comparisons reflect. 本文试图通过对这两部韵图在等列的变迁、各韵用字的不同等方面进行详细的比较，借以阐释这些不同所反映的实际语音系统的演变。