A sincere suggestion: Don't touch short selling.

It's not that short selling can't be done; it's just that its difficulty is much higher than going long—skills, timing, effort, capital, time; every link must be tightly controlled. If you want to make big money from short selling, you have to wait for the chain-reaction liquidation market, but such opportunities are fleeting. Do you have the vision and courage to seize them? Do you really think you're the chosen one? Ask yourself honestly.

Before trading, first understand: Are you cut out for this? Handle matters commensurate with your abilities. Understand your own character before discussing techniques.

If you can't stand losses and plan to stubbornly hold on when losing, it's better to exit early.

The essence of the trading market is plunder; every bit you earn is a loss for someone else. Why should you win? By being stubborn?

Lastly, to be straightforward: retail investors are better off trading spot.