晁蓋
On one occasion, the Zeng brothers of the Zeng Family Fortress rob a precious steed from Duan Jingzhu, who originally intended to present it as a gift to Chao Gai. The Zengs have all along been hostile towards Liangshan and have put up slogans around their fortress to insult Liangshan's leaders. After the Zengs ambushed and injured Liu Tang for no apparent reason, Chao Gai can no longer stand their provocations and decides to personally lead Liangshan forces to attack the fortress and teach the Zengs a lesson.