Omg I'm so confused. Sorry for not mentioning binance.us in the OP. I've always been using binance.us for many years and the btc, eth, and all other prices have always been consistent. Why are they lower now?
But still I'm curious that you are actually using the official app (if that image was captured as of today). I have looked at the binance us chart more closely, no btc/usd price has even gone below 30k since the close last June.
The price diff between US and Global is not very significant at this time.