How many stock market crashes have I been through? Which one was the most memorable, and what lessons did I learn from it?

Having worked in Central for many years, I've personally weathered several major market crashes, learning practical lessons each time.
I've personally experienced several major shocks: the sharp decline due to mainland policy adjustments, the stock market crash triggered by the pandemic, the major adjustments during interest rate hike cycles, and a few sharp, short-term corrections. The most unforgettable was definitely the crash during the pandemic.
At that time, I was overconfident, thinking I was great at reading charts, and went all in on growth stocks with a full position, leaving no cash at all. The market kept falling for days, turning paper profits into deep losses. I held on, hoping for a turnaround and refusing to cut losses, but was eventually forced to liquidate at low prices, suffering heavy losses.
That lesson stays with me to this day, constantly reminding me:
Never go all in; cash is your amulet in a bear market, giving you ammunition when a black swan event strikes.
Avoid concentrating on a single sector; diversifying your holdings is the only way to withstand a major downturn.
Set stop-loss levels in advance; don't stubbornly hold on waiting for a rebound. Many stocks can be trapped for years without recovering.
Don't try to catch a falling knife in the early stages of a decline; you'll just get trapped deeper. Wait for emotions to cool before buying in batches.
Stay away from small-cap, volatile meme stocks in a bear market; with no liquidity, you can get locked in and unable to exit.
Many young people only know how to trade in a bull market, thinking a crash is far away. The cycle of bull and bear markets is the norm. You make money in a bull market, but you truly cultivate your mindset in a bear market.
Since surviving that ordeal, I've completely abandoned the 'go for broke' mentality. My operations prioritize stability: controlling position size, diversifying, and sticking to stop-losses. Winning in the stock market isn't about how much you make in one trade, but whether you can stay in the market long-term and avoid being wiped out by a single major crash.
The most powerful ability in investing has always been preserving your capital.$Hang Seng Index(00HSI.HK) $TENCENT(00700.HK) $BABA-W(09988.HK) $MINIMAX-W(00100.HK)