This book is an important outcome of the Fifth World Internet Conference. It provides a comprehensive review of Chinäs Internet development, especially the new practice and achievement in 2018. And it offers a systematic account of Chinäs experience in Internet development and governance. This year, the book improves Chinäs Internet Development Index System, optimizes the algorithm model, and enhances data collection, to assess and reflect Internet development more comprehensively, objectively and scientifically.