Guan Yu's Tushan about Three Things is a hill in Tushan Town, Pizhou City, Jiangsu Province. From Ming Luo Guan Zhong's Romance of the Three Kingdoms, the 25th time: Three things in Tuntu Mountain Pass Conference, saving the white horse and Cao Cao from the tight encirclement. After Liu Bei was defeated by Cao Cao in Xuzhou, he was separated from Guan Yu and Zhang Fei and went to Yuan Shao in Hebei alone. Cao Cao captured Xuzhou Xiapi with one move, and Cheng Yu offered a move to force Guan Yu to rescue him. General Zhang Liao went to Tushan and surrendered. Zhang Liao, who had met Guan Yu once, was sent to surrender.
Guan Yu put forward three preconditions:
First, only surrender to Emperor Xian of Han Dynasty, not to Cao Cao;
Second, Liu Bei's two wives should be supported and respected;
Third, once I know the whereabouts of my younger brother Liu Bei, I will immediately go to the enemy.
Three conditions are indispensable. Cao Cao was eager to love talents and agreed to all the requirements of Guan Yu. Emperor Xian of Han also appointed him as a partial general.