The North City Gate was manned by a dedicated person. In the past, the six imperial palaces would take turns sending people here, but now, this rotational system was essentially abandoned, and the North City Gate was manned solely by people from Jianwu Palace; Emperor Jianwu had completely taken control of this place. In response, Yonghe Palace, Bahuang Palace, Wenzhi Palace, and Huoyang Palace all adopted a tacit acceptance, and Chaoyang Palace did not send anyone to negotiate.