Chang Yuqing, the general of the Northern Desert, quietly led his cavalry into the Southern Xia territory. On the way, he made a private detour to the city of Hamburg, hoping to find the reclusive arrow-making craftsman Li Erniu.However, Liu Jingzheng, the city guard of Hamburg, told his deputy general Tang Shaoyi to be optimistic about a batch of military supplies temporarily stored by the Yuzhou Army in the city treasury. However, Tang Shaoyi deliberately withheld the military supplies to supplement the defense of Hamburg City.
Amai designed and stole Chang Yuqing's disguised road guide outside the city, and successfully entered Hamburg City. After finding a way, he finally met the ghost-hand Ah Si and presented Chun Niang's token.