Most of them are unreliable, very simple, where things come from and who consumes them, and many of them are about making money. In fact, they just took advantage of your mentality of making money. There is also a gap between theory and practice, such as everyone's execution. Anyway, there is no such thing as pie falling, but I have a set here for you to refer to. It won't cost 30 yuan anyway. 07。 55。 0。 24。