This passage discusses the first severe punishment before凌迟, which was 车裂 (五马分尸), a brutal method of execution used to discipline those posing a threat to royalty. It highlights the fall and rise of this practice throughout history, from its prevalence in春秋战国时期 to its decline with the introduction of more painful methods like凌迟. The end of carnelian torture marks the shift towards more advanced tools and less残忍的方法 in the唐代.