This book is the first blue book on the research outcomes of Ecological Red Lines (ERLs) of China. It systematically summarizes the process, methodology, achievements, and practical case studies, putting forward ideas and suggestions to strengthen the supervision and administration of ERLs. It is a reference for policy makers and all sectors of society. Chapters are carefully developed to cover (1) introduction of delineating ERLs, (2) progress and methodology, (3) achievements, (4) management and control measures, (5) practical case studies of local government. It is a valuable read for researchers of ecological conservation engineering as well as organizations engaged in ecological civilization practice.