This book is one of the "World Heritage in China" series. This series of publications, as a collection of the results of research and practices in the field of world heritage protection, conducted by many experts and scholars from Tongji University, Peking University, Fudan University, and Southeast University in China, is on the one hand, a vivid demonstration on the outstanding universal values of the Chinese world heritage sites. On the other hand, it demonstrates the tireless efforts made to protect the World Heritage by the country and helps foreign readers fully and concretely understand the value and status of China as an ancient Civilization country in the world. This book closely introduces the World Heritage's historical cities in China, including Pingyao, Lijiang, Macao, and Gulangyu.