单双出现规律的公式

简介：Huguang is different from Xuanfu. Xuanfu is only three hundred miles away. Any important news can be delivered in one day. But Huguang is two thousand miles away. Once something happens, it is difficult to deliver urgent news. Not to mention that when the emperor goes on an expedition, many people must accompany him, which is very prestigious and consumes a lot of money. Therefore, Li Banghua disagrees.