This book explores Shimenkan—a Miao-inhabited area in Weining County, China—and its rural society from a comprehensive and long-term perspective, drawing on research conducted by the author in the course of ten years. Located in the northwest of Weining County in Guizhou Province, Shimenkan is a multiethnic area, where, e.g., the Hans, Miaos, Yis, Huis, and Buyis live. Until the early twentieth century, it was a small mountain village; the introduction of Christianity led to significant cultural and social changes in this area. Focusing on China in the twentieth century, the book addresses the traditional culture of the Miao people, the popularity of Christianity in early modern times, the management and control by the  government, the socialist reform in the period of the People Republic of China, and the changes following the reform and opening-up in recent years. Covering a century worth of history, it discusses the major historical events in Northeastern Yunnan andNorthwestern Guizhou around Shimenkan and analyzes local social structures, religions, ideologies, customs, and ethnic psychologies, making it a valuable addition to the study of regional social history. The book draws on archives, literature reviews, and field surveys and pursues a multi-disciplinary approach combining history, anthropology, and other disciplines. It offers a valuable resource for researchers in history, religion, and ethnology, as well as readers interested in the spread of Christianity in the Miao-inhabited areas of southwestern China.