B2B(BusinessToBusiness) refers to a kind of market field, which is the marketing relationship between enterprises. E-commerce is the concrete and main form of modern B2B marketing. It closely integrates the intranet with customers through B2B websites, and provides better services to customers through the rapid response of the network, thus promoting the business development of enterprises. \ x0d \ x0d \ C2C is actually a technical term of e-commerce, and it is an e-commerce between individuals. C2c means consumer room. Because 2 is pronounced the same as to in English, ctoc is abbreviated as c2c. C refers to consumers, because the English word for consumers is consumer, so it is abbreviated as C. C2C means ConsumertoConsumer. \ x0d \ x0d \ B2C is the abbreviation of English Business-to-Consumer, and its Chinese abbreviation is "business-to-customer". "Business-to-customer" is a mode of e-commerce, that is, commercial retail, which sells products and services directly to consumers. This form of e-commerce is generally based on online retail, and online sales activities are mainly carried out with the help of the Internet. \ x0d \ x0d \ c2b is an e-commerce model, that is, customertobusiness. The first popular consumer-to-business (C2B) model in the United States may be a noteworthy attempt. The core of C2B mode is to form a strong purchasing group by aggregating scattered but huge users, thus changing the weak position of users under B2C mode and allowing them to enjoy the benefits of buying single products at the price of big wholesalers. At present, few domestic manufacturers really adopt this model completely.