This book aims to deeply study and implement the guiding principles of General Secretary Xi Jinping’s important speeches and instructions on building a moderately prosperous society in all respects. It implements the Central Committee’s decisions and plans, and closely centered on the era background where the entire Party and people of all ethnic groups in China embark on a new journey to build China into a modern socialist country in all respects and advance toward the Second Centenary Goal. From theoretical, historical, practical, and future-oriented perspectives, This book systematically reviews the theoretical origins, the great journey, and historical positioning of building a moderately prosperous society in all respects. It further explores the action guidelines, remarkable achievements, key experiences, major tasks, and strategic measures involved in this process. Additionally, from the perspective of building a community with a shared future for humanity, the book analyzes the contributions of building a moderately prosperous society in all respects and envisions a promising outlook for the new journey ahead..