Focusing on the integration of the Chinese civilization over the last four millennia, this book outlines the history of clashes, interactions, and fusion between the Huaxia civilization and the Grassland civilization, the two major powers shaping the history of China, from multiple perspectives. It particularly emphasizes how the two regional civilizations adapted themselves in response to each other throughout their evolution, and how they eventually combined to reach the pinnacle of a unified shining Chinese civilization. This book is a macroscopic delineation of the Chinese civilization aiming at helping readers better understand the origin of the Chinese identity, the Chinese nation, and its future.