Last night I shorted the entire position at 3420, with a stop loss at 3450. Luckily, I made a big profit and I'm glad I firmly believe in Sister Qin's judgment.

Let's get to the conclusion first: it's not done falling yet! The market's rise and fall logic over the past month is very clear: it rises ahead of the interest rate cut, then on the day of the rate cut, it starts to plummet as the benefits are fully realized, and it won't just drop for one day; it will at least fall for 1-2 weeks.
So the operating logic for the next two weeks is to short at highs, or just hold onto the low-leverage long positions entered last night. The small support levels are around 3130 and 2940, but the final pullback is likely to reach the previous low around 2700.
In the short term, the drop has been a bit excessive, falling directly from 3450 to 3170, which is nearly a 10% drop, so chasing shorts isn't very worthwhile. It might be better to wait for a rebound to around 3250 before shorting.