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There is a rule where a stock isn't allowed to rise or fall by more than 10%. It doesn't really work because there are ways to circumvent it using financial instruments which are a proxy of the stock price but not subject to the same rules.

US stock markets also have points they will freeze at: https://personal.vanguard.com/us/content/Funds/FundsToolsCir...

That’s for the entire S&P 500 index and only applies to a 20% drop. Chinese regulations apply to individual stocks and kick in at 10%.

That’s a massive difference.

And re the Limit Up-Limit Down rule, that’s a trading halt for five minutes, not the entire day.

Again, not as much of a, but still a massive difference.

trading is suspended once it hits the threshold