The story of "Lianhuan Tao" Dou Erdun, the master of the mountain fortress Lianhuan Tao, has been bearing animosity towards Huang Santai for 30 years. Dou knew that Chief of the Imperial Military, Leung, was going to cross the border along with the Royal Horse of the Qing Emperor. By this chance, he successfully set Huang Santai up by stealing the horse and left a note with Huang's name on it at the crime scene. Since Huang died earlier, Leung requested Huang's son, the head of the Imperial Arms Huang Tianba, to look for the lost royal horse. Huang Tianba sneaked into the mountain fortress and fought against Dou. Finally, he converted an enemy into a friend. He not only brought back the royal horse but also successfully made Dou together with the tribes of mountain fortress bow to the Qing Court.
While the character on his right hand side should be Huang Tianba, the character with blue face always represents Dou Erdun. According to the traditional practice of Beijing opera, blue mask emblems outspoken and impetuous personality.