What is the fundamental purpose of Song Jiang's outwitting the inaction army?

It is said that the water margin hero of Bailong Temple outside Jiangzhou robbed the giving ceremony and saved Song Jiang and Dai Zong. Wearing ties are Chao Gai, Hua Rong, Huang Xin, Lv Fang, Guo Sheng, Liu Tang, Yan Shun, Du Qian, Song Wan, Zhu Gui, Wang, Zheng Tianshou, Shi Yong, Ruan Xiaoer, Ruan Xiaowu, Ruan and Bai Sheng. More than forty people, including Zhang Shun, Zhang Heng, Li Li, Mu Chun, Tong Wei, Xue Yong and Jiuchou, all private businessmen on the river came to meet them. Li Kui jy, the black whirlwind in the city, led the crowd to Xunyang River: two ways to help. -Tong * * There are forty or fifty people, all gathered in Bailong Temple. I heard a report from my minions: "Soldiers in Jiangzhou City,