This book systematically sorts out the dynasties that achieved great unification in Chinese history, trying to follow in the footsteps of the ancients, from multi-dimensional perspectives such as their governing philosophy, cultural exchange principles, ethnic policies, and foreign policies, with vivid historical and cultural stories. The whole story of the formation and development of a multi-ethnic country. Looking at the present should learn from the past, and the past cannot make the present. Today, in the process of promoting the modernization of the national governance system and governance capabilities, China is also constantly absorbing the excellent traditional Chinese culture. The socialist core values ??implemented in China today, the principle of harmony without diversity, the policy of regional ethnic autonomy, the construction of the Belt and Road and the community of shared future for mankind all reflect the creative transformation and innovative development of Chinese culture. .