lic.Because the entire "Zhenguan Political Principles" talks about only one thing, that is how to be an emperor and how to govern a country.It's fine for the Emperor and Crown Prince to read this book...lry hold off the Liao army's main force. Have you ever thought about it, did Yelü Shenxuan not consider the existence of the Yan Yun Sixteen Cavalry If the Yan Yun Sixteen Cavalry never appeared on th...