Li Zhiyuan's "Double Tone"? Laurel medal? What kind of thoughts does reading history express?

Li Zhiyuan, a composer in Yuan Dynasty, mentioned Yumenguan in his works. He wrote a song "Double Tone? Laurel medal? Read history "wrote

If the west wind is full of ambition, it can be idle without crying. Jia Yi moved south, Feng Tang grew old, and Guan Yu died.

I hope I can survive the Jade Pass, and I won't cut Loulan with a knife.

Turn your head to your pale face so that you can find your fur. Don't ask Tianshan Mountain.

In the word, Jia Yi moved south, which means that Jia Yi, a politician in the early Western Han Dynasty, was demoted to be the teacher of King Changsha of Han Dynasty and died of depression. Feng Tang's aging refers to the fact that Feng Tang, a native of Anling in the Western Han Dynasty, was once a great star and incompetent before Emperor Wen. He was appointed as a corps commander only when he was very old. Guan Yuxi also mentioned Guan Yu's failure in Maicheng and his death in the West.

In this song, Yumenguan is still a cultural symbol representing the Golden Goma Iron. The hair turned white, and the Loulan sword turned into a fox and fur. From the generosity and indignation when reading history, it turned into a depressed and secluded complex, full of twists and turns.