The most common way to make money by realizing knowledge is to pay for content. It is applicable to both college students and other groups. Content payment has only emerged in recent years. For example, more and more knowledge payment platforms such as access, answering, Himalayan, Weibo Q&A, Krypton space and so on have mushroomed. Make your knowledge into content and courses, upload it to these platforms, and those who are interested and need will pay. Then your knowledge can be realized and you can make money. One of the biggest benefits of realizing knowledge (content payment) is that there are tools to help now. As a third-party support tool for knowledge payment, plaider can help more institutions and individuals with teaching resources and knowledge content to deploy online education systems more conveniently, quickly and at low cost, and connect more students. Help the course realize and the student fans precipitate.