It is a light warehouse that follows the general trend, that is to say, judging the general trend by looking at the cycle of the big level, generally referring to the K line of the monthly line. If the monthly K line is lower than the five-day line, it indicates a long-term weakness. At this time, you can short the warehouse. Why set fire to the warehouse? Because even in a bear market, there will be inflation, although it will come down later, but if you have a heavy position, you can't survive that inflation. In the worst case, the position may be directly exploded, and in the worst case, it will be eliminated.