This book conducts an in-depth exploration of the dissemination of Chinese characters in East Asia and the formation and development of Chinese character-based writing systems, emphasizing the unique contributions of various ethnic groups within the Chinese character cultural sphere to the evolution of Chinese characters. Based on historical research and cross-cultural comparison, this book offers a comprehensive and insightful perspective, revealing the developmental laws and cultural attributes of Chinese character-based writing systems in East Asia. It pioneers a new research field in Chinese character studies and possesses positive reference value for understanding the evolution of the Chinese character system from a more macroscopic perspective.