It seems that 4440-4480 is indeed not easy to reach. After touching 4520, it rebounded to 4660. At the beginning of the afternoon, it was said that going long at any point would be profitable.

Do not go long below 4560, just like not going short above 4800 in the past two days. Key levels are 4540-4480-4440, feel free to manage it yourself, take profit when you should, and 4440-4480 may not necessarily be reached. I want to emphasize again, if you short below 4380, you should do a T (trade), it won't be that easy for you to break even.