sassy jewelry wholesale Why do the foreign exchange rates around 5:30 in the afternoon change the most?

sassy jewelry wholesale After changing tens of thousands of dollars, I started to pay attention to foreign exchange licenses. Now the daily exchange rate is 6.08*. Why does it suddenly reach 6.11 ~ 6.12 at about 5:30 in the afternoon? Is it better to settle foreign exchange at that point? Seeking advice.