identity. He is brought to Chao Gai, the chief of Liangshan, and Wu Yong. Wu suggests faking a letter by Cai Jing to order Cai Jiu to send Song Jiang to Dongjing for punishment. The plan is to rescue Song midway. But he needs the help of the scholar Xiao Rang, who could imitate Cai Jing‘s distinctive and universally recognised handwriting, and the engraver Jin Dajian, who could fabricate Cai‘s personal seal. Dai Zong hurries to call on the two men and lies to them that their skills are needed in the renovation of a temple. Xiao and Jin are brought near to Liangshan, where they are kidnapped. The two have no choice but to join the stronghold and participate in Wu Yong's plan. Cai Jiu nearly falls for the ruse. However, Huang Wenbing points out that the seal on the letter is not an appropriate one between father and son -- a sign that the letter is fake. Furious that Dai Zong has betrayed him, Cai Jiu orders his arrest. At Huang‘s urging, Cai Jiu sentences both Dai and Song to death. Meanwhile, Wu Yong has realised the mistake in the letter. He sends several chieftains to rescue the two in Jiangzhou. Just when the executioners are about to swing their knives in the public execution, Li Kui jumps out and kills them. The Liangshan chieftains surrounding the place also rush forth to fight off the soldiers. Dai Zong follows the outlaws back to Liangshan. Dai Zong serves Liangshan well with his running speed, which is especially important in an emergency situation. For example, when Song Jiang is thwarted by the sorcery of Gao Lian in his military attack on Gaotangzhou (高唐州; around present-day Gaotang County, Shandong) to rescue Chai Jin, Dai Zong is despatched to Jizhou (薊州; present-day Ji County, Tianjin) with Li Kui to locate the Taoist magician Gongsun Sheng, who could rival Gao. Gongsun has left Liangshan to visit his mother and has failed to return. Li Kui is enabled to travel in the same pace as Dai, but he could not make a brake when propelled by Dai into dizzying speeds after he infringed the latter's order to keep to vegetarian food. They eventually find Gongsun and the three speed to Gaotangzhou. In another instance, Dai brings the physician An Daoquan speedily back to Liangshan to cure Song Jiang of a deadly tumour. Dai's speed