Zhenguan rule was a period of political clarity, economic recovery and cultural prosperity during the reign of Emperor Taizong and Li Shimin in the early days. Because the year number is "Zhenguan" (627-649), it is called "Zhenguanzhi" in history.

Emperor Taizong can be honest and make good use of others. Speak freely, respect life, exercise self-restraint, and be open-minded to teach; And adopted policies such as taking agriculture as the foundation, practicing economy, recuperating, reviving culture and education, and perfecting the imperial examination system to stabilize the society;

And vigorously pacify foreign aggression, respect border ethnic customs, stabilize the border areas, and finally achieve the ideal situation of governing the world. The rule of Zhenguan laid an important foundation for the prosperity of Kaiyuan and pushed China's traditional agricultural society to its peak.

Extended data:

The General History of China has a distinct theoretical system, creatively puts forward important theoretical understanding about the historical development of China, and shows a profound understanding of the history of China.

In terms of compiling style, it borrowed and absorbed the forms of various ancient history books in China, creating a "new synthesis". Each volume is divided into four parts: preface, abstract, chronology and biography, involving literature, research status, laws and regulations, major events and historical figures.

Including politics, economy, military affairs, culture, natural science, social life and other aspects, trying to comprehensively, stereoscopically and systematically show the whole picture of China from primitive times to modern times.