The price has broken below the previous range consolidation's lower edge, and several K lines have plummeted. When the price rebounds again to the vicinity of the previous range consolidation's lower edge (indicated by the circle) and is resisted, we can use the previous range consolidation's lower edge as a resistance level to enter short positions. Generally, in such cases, entering short positions based on previous highs or lows as resistance or support levels has a higher probability of success than going long.
It is not difficult to notice in the image that during a wave of declining prices, it may take just a few K lines to complete, whereas during an uptrend, it may take dozens or even hundreds of K lines to complete the rise.