The Tieshuo Rebellion outside the Pass is described in the History of Yan as a disease caused by scabies.
Scabies is a chronic disease of the body and skin. Taiyuan Hospital records: To treat this disease, you should cut out the flesh and apply medicine, and you will be cured. Those homeless people are the pieces of flesh cut out by the Great Yan Empire. But after all the flesh was cut off, how could the empire still fall?
(Alternate history/war/group portrait/non-shuang article)