The book aims to help readers comprehensively understand the concepts, principles and practical applications of e-commerce, to master the basic knowledge and skills of e-commerce from different dimensions, and to improve the readers' understanding and applications in the field of e-commerce. For different groups of readers, this book combines theoretical research with engineering application research and combines typical cases with practical experience in Chinese context, which focuses on the scientific, technical, as well as systematic and complete knowledge system of e-commerce, and provides readers with forward-looking, academic, and applied reference materials in e-commerce. Based on different theory branches and application scenarios of e-commerce, aiming to cover different groups of readers, this book covers the following areas: Fundamentals and Scientific Research of E-Commerce, E-Commerce and Financial Payments, E-Commerce Laws and Regulations, E-Commerce and Logistics, E-Commerce and Big Data, Rural E-Commerce, Cross-border E-Commerce, E-Commerce and Internationalization, E-Commerce Theory and Practice - Typical Cases, and E-Commerce and Digitization, et al. This book can be used as learning materials for public administrators, enterprise managers, e-commerce and other modern service industry practitioners. It can also be used as a reference book for undergraduate and postgraduate students of e-commerce and related majors in institutions of higher education, to help the relevant personnel to continuously learn and improve their professional ability and quality.