刷水套利是怎样实现的

简介：In the thirteenth year of Chongzhen, Mandahai followed Huang Taiji to besiege Jinzhou, and the following year he was granted the title of auxiliary Duke. Unlike the first-class Dukes of the Ming Dynasty, the Duke of Jianlu had a relatively low title, below Beile and Beizi. It was also because the Duke's title was relatively low that Man Dahai was eager to make meritorious deeds.