What do O2O, C2C, B2B and B2C mean? What is the difference?

B2b is the abbreviation of businesstobusiness. For example, small computing platform is a business model for small and micro enterprises, that is, business-to-business service \x0d\b2c is the abbreviation of Businesstocustomer. For example, JD.COM's early direct selling model was a personal consumption service \x0d\ C2C, which is the abbreviation of customertocustomer, bought for buy buy, a JD.COM enterprise. For example, Didi is the business model of individual drivers serving individual passengers. \x0d\O2O is the abbreviation of onlinetooffline, which is an enterprise that takes orders online and offline and serves offline.