this book is easy to understand, easy to understand, moderately difficult in theory, closely related to legal knowledge and e-commerce, and 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 and universities, as a training material for various short-term training courses related to e-commerce, and as a self-study reference for readers who are engaged in e-commerce or interested in starting businesses by using e-commerce.