The Great Wall of China is the world’s largest military defense structure. It towers and meanders along mountain ranges, constructed more than 2,000 years ago. It was made more brilliant by the numerous wars, power struggles, successive dynasties, political and economic historical events influencing imperial China for over 2,000 years.The everlasting value of the Great Wall comes from the architecture, with its components of the wall, gates, towns, garrisons, and signal towers, along with their artistic elements. It also derives fame from the countless classical works of poetry, folk literature, theater and storytelling written about it by rulers, soldiers, literati and famous poets.This book is among the most systematic and comprehensive works on the Great Wall. It conveys to the reader content in language that is clear and straightforward. It traces the history of the Great Wall’s origin, including the initial Period of construction for multiple defensive walls, the era of overall transformation, the Period of the partial expansion and the Period of overall maintenance. The readers will obtain a clear and comprehensive view of the overall picture of the Great Wall and its history from this book.