This chapter first introduces the concept and nature of e-Commerce Law, as well as the legal and regulatory system of e-commerce (laws and regulations that regulate e-commerce entities and their behaviors) and the legal relationships of e-commerce; Secondly, the subject of e-commerce is introduced, including the definition and classification of the subject, as well as the registration and publicity of e-commerce subjects. Finally, the general obligations of e-commerce entities are introduced, including the obligation to pay taxes in accordance with the law, the obligation to disclose subject information, the obligation to preserve transaction information, and the obligation to protect consumer information.