E-commerce is not a unified form.

There are two forms of e-commerce: e-commerce with sources and e-commerce without sources.

E-commerce with sources generally refers to e-commerce platforms that have their own sources, such as through cooperation with suppliers or self-built warehouses, etc. The platform has its own inventory of goods and can sell goods directly to users, such as JD.com, Amazon, etc.

E-commerce without sources generally refers to e-commerce platforms that only provide channels and sales platform services, and are not responsible for procurement, storage and delivery. Instead, third-party suppliers are responsible for providing goods and delivery, and the platform only plays the role of information flow and capital flow, such as Taobao, Tmall, etc.