In theory, buy from the daily limit and go out at the daily limit. If you are in Man Cang, the daily limit will basically double. This kind of market may happen once a year. If you are a normal person in Man Cang, you can double your luck in two or three days. Experts don't do that. One or two times the annual income is enough. You don't place orders every day. First, conform to the general trend (basic analysis+technical analysis), second, do a good job in fund management, third, do a good job in risk control, stop loss fourth, and a good attitude is the key.