The first model is the most traditional sales model, which can include things from traditional department stores and massage services. This model is realized as e-commerce and O2O on the Internet. \x0d\\x0d\ The second mode is also considered as selling "goods", but the goods are a bit special, selling the right to use digital products. Originally the licensing mode of Windows, it is now reflected in the service fees of IaasS, PaaS and SassS. Windows and Oracle are still in licensing mode, but cloud services have gone too far, charging only service fees. \x0d\\x0d\ The third mode is to build a platform for division. This is obvious on websites like Qidian, where the author shares the income of paid subscriptions with Qidian. \x0d\\x0d\ The fourth mode is the advertising mode. This model is essentially equivalent to selling traffic. Advertising itself can be divided into three generations: the first generation is small advertisements on telephone poles, portal advertisements and TV advertisements; The second generation is Google-style, providing relevant advertisements according to keywords; The third generation is people-oriented, and soft-text advertising is like this. \x0d\\x0d\ The fifth is to sell value-added goods. The game and the crown of QQ are all in this mode. \x0d\\x0d\ VI is the virtual central bank model. This is special and needs to be said more. The difference between a central bank and a general bank is that it does not make money, but it does. In reality, the central bank can collect seigniorage by issuing more paper money, but for the virtual world, this is a profit model. Imagine that as long as a virtual community is large enough, its virtual currency has a high exchange value, so the circulation is the money that can be earned.