Speaking of expression, what is the allusion of hanging the seal of three Qi kings around the waist?

This is a sentence (half sentence) in an article by Prime Minister Lv Mengzheng in the early Northern Song Dynasty. This refers to Han Xin. His legs were humiliated, but in the end, he hung three seals of the King of Qi (one was his fief, and the other two were seals captured by the princes of Qi when he defeated the late Qin Dynasty, which was only a symbol of his political achievements). Sue Han Xin's reputation.