But there is something odd that I never met before in other product.
When I write some micropython code , and run in Tab5 through serial port by push down "PLAY" button. The code will run correctly, except the thread of UIFlow Interface still running.

So, if press the position of "POWER", "SLEEP".... , where the interface of UIFlow show it. These button will show out, even my micropython code was nothing about it.