The content of "Zi Zhi Tong Jian" is mainly about politics, military and ethnic relations, as well as economic, cultural and historical figures evaluation. The purpose is to warn future generations through the description of the ruling class policies that are related to the rise and fall of the country and the rise and fall of the nation. Read it, draw on the experience of the ancients to enlighten the present, and use history as a mirror to illuminate the way forward. It is a rare historical masterpiece. Reading it can not only systematically understand history, but also gain wisdom on self-cultivation, family management, and country governance. It is a book of wisdom that has been passed down for thousands of years.