Subsystem	Module	Index
Value proposition (adding the size of online shopping users, the average consumption of online shopping users, the ability to meet demand, the adjustment factor of demand, the attractiveness of enterprises, the quality of service, the growth rate of orders, etc., as shown in Figure 3)	Value proposition	Describe the series of products and services provided by B2C e-commerce companies to users, thus providing value to customers. Enterprises deliver value to customers through logistics or network channels (channels of electronic products). This article will express this constructor module with two variables, order and user requirements.
	Client subdivision	Describe the different people or organizations that B2C e-commerce companies want to reach and serve. The group of users who buy products or services on the B2C e-commerce platform is called “active users”. This article will use active users as the main variables of customer segmentation building blocks.
	Channel access	Describe how B2C e-commerce companies communicate and reach out to their customer segments to deliver their value proposition. This paper believes that the B2C e-commerce platform is the channel of the enterprise, so the structural module of the channel is not strictly defined.
	Customer relations	Describe the type of relationship established between a B2C e-commerce company and an active customer segment. This article expresses the customer relationship structure module with two variables: user experience and repurchase rate (repetitive purchase rate).
Value creation and delivery subsystem (adding brand value, value creation rate, supply chain capability, ability to meet demand, external investment confidence index and other auxiliary elements, as shown in Figure 2)	Core resources	Describe the key resources necessary for the B2C e-commerce business model to function effectively, and serve as a bridge for value transfer. As a typical Internet company, B2C e-commerce enterprises have a small proportion of their physical assets. The more platform merchants and cooperative brands, the more goods and services users can choose, the more attractive the platform is to customers, and the cooperative brand is an important “intangible asset”. Therefore, the core resource construction module in the B2C e-commerce business model mainly includes important variables such as cooperative brands, enterprise employees, external investment, and income.
	Key business	Describe the most important things that B2C e-commerce companies must do. The purpose of B2C e-commerce enterprise is to be customer-centered. All business processes are carried out around users. Capabilities are tangible or intangible processes that evolve from the interaction of enterprise resources. The development of key business is finally transformed into enterprises to meet customer needs. The ability to use the variable “enterprise capabilities” to define the key business of B2C e-commerce companies. The key business structure modules mainly include operational capability, growth capability, and profitability. These three capabilities are collectively referred to as enterprise capabilities.
	Important cooperation	Describe the network of suppliers and partners needed to make the B2C e-commerce business model work effectively. Platform merchants and cooperative brands are two important partners. The more partners, the more they can reflect the effects of economies of scale, helping to effectively reduce costs and create more value for customers. The important cooperative construction modules mainly include the two elements of cooperative brand and external investment.
Value acquisition subsystem (adding unit order cost, single customer order quantity, customer unit price, profit, gross profit and other auxiliary elements, build value acquisition subsystem, as shown in Figure 4)	Source of income	Describe the cash income a company receives from an active user community. At present, there are three main sources of income for B2C e-commerce companies: self-operated commodity income, transaction commission (by providing services for merchants and users for B2C e-commerce platform, charging a certain percentage of fees in order fees), and other income (such as advertising, fees, etc.). The revenue source structure module mainly includes two important variables of commodity income and other income.
	Cost structure	Describe all the costs incurred in operating a business model. B2C e-commerce provides a platform for direct transactions between merchants and users, manages customer relationships, and incurs costs when completing user orders to earn revenue. The cost mainly includes: the order cost (the direct cost associated with the order generated by the user to purchase the self-operated goods), the operating cost (the indirect cost incurred for the service user and the user’s demand to complete the order, including marketing expenses, logistics costs, management expenses, technology and content costs). The cost structure construction module mainly includes order cost and operation cost, and the operation cost is subdivided into marketing cost, logistics cost, management fee, technology and content cost.