After being reminded, there was a heavy geographical error in chapter 570, thirty miles south of Yanmen Pass, just after entering Xinzhou, it was Xinzhou Dai County that was attacked, not Xinzhou City, so a major modification was made to the second half of 570, and I hereby declare that I apologize for the inconvenience caused. More attention will be paid to this in the following paragraphs, and that's all. (To be continued......)