1. Firstly, the original language characteristics of poetry retrogressed and displacement appeared. 首先,诗歌本质特征整体退化,发生了位移。
2. But in the later period of Liao Dynasty, its legal systems retrogressed a lot and many achievements obtained in the beginning were lost. 但是到了后期,其法制却出现了大的倒退,遭到严重破坏,前期取得的成果丧失殆尽。