Not reliable,

Online teaching of short video sales is unreliable. There is no free lunch in the world. Free is always the most expensive. No one is willing to tell you everything about how they make money. What they can tell you is that it is difficult to make money. Short video and live streaming sales are a small number of people who get dividends in the early stage, and then they eat the old capital in the later stage, and the remaining chicken ribs.