Who is the blue-faced Dou Erdun thief?

Short answer: The blue-faced Dou Erdun in the lyrics refers to the chivalrous man in the circus of stealing horses in Beijing Opera, and the stockade owner Dou Erdun in a series of camps (now a dangerous place in Zhangjiakou City), named after his "blue flowers and three tiles" face. (This person does exist in history. His real name is Dou Kaishan and his nickname is "Erdong". He was from Dousan Town, Hejian Prefecture, Zhili, Qing Dynasty. He was a hero who resisted the Qing court and was later killed by the Qing court. ).

Dian Wei refers to Dian Wei (the official position is "a captain"), the bodyguard of Cao Cao in traditional Chinese opera. The characters in the play have the face of the battle of Wancheng in Beijing Opera, so this song is sung in the lyrics. Historical records: Dian Wei and Chen Liu were born in Wu Ji (now Jiwucheng Village, Ningling County, Shangqiu City, Henan Province). At the end of the Eastern Han Dynasty, Cao Cao was appointed. He looks big and powerful. In the second year of Jian 'an (197), Zhang Xiu betrayed Cao Cao, and Dian Wei fought against the rebels to protect Cao Cao, killing many people, but eventually he died because he was outnumbered.