From the perspective of exchanges and mutual learning among human civilizations, this book is divided into fifteen special topics to carefully examine the intricate relationship between the "law system" born out of ancient Indian civilization and China's native "ritual system", carefully sort out the objective historical facts of the conflict, collision, coordination, and integration of the two, and deeply reveal the process, characteristics, experience, and laws of the sinicization of Buddhist precepts. By studying the relationship between "law system" and "ritual system", the author analyzes the positive and negative effects of foreign culture on the development of traditional Chinese culture from one aspect, and outlines the tortuous path and wonderful process of Chinese culture's richness, prosperity, breadth and depth. At the same time, this book also strives to use this basic empirical research to provide practical experience that can be used for reference today in absorbing foreign culture and prospering and developing the socialist culture with Chinese characteristics in the new era, discovering ideological resources that can be absorbed, and displaying fine traditions that can be creatively transformed and innovatively developed.