The book integrates Hakka studies into development history in eastern Guangdong based on ecology and folklore that are representative, reflecting theoretically on social functions and evolution routes in the period of social transition. This book emphasizes on integration of regional history research with combination of official references and folk references in analysis and demonstration. Although the inspection is limited to Hakka area in Eastern Guangdong, a horizontal comparison is made with folk customs in Eastern Guangdong, Fujian, Jiangxi, Taiwan and other regions. The book is of great significance for us to understand Hakka folk customs across the regions