This book is easy to understand and moderately difficult in theory. The legal knowledge involved is closely related to e-commerce, which is forward-looking and practical. This book can be used as a teaching material for e-commerce, economic management, marketing and other majors in higher vocational colleges, as a training material for various short-term training courses related to e-commerce, and also as a self-study reference for readers engaged in e-commerce or interested in using e-commerce to start a business.