Thank you for reply,Tommy.
I really understand your thinking.
It's my driving movies in the racing track.
https://youtu.be/1jj0ltsJqVI
I hit 5800 RPM in 4th gear at 120MPH,and shift to 5th gear. It accelerate to 130MPH before the straight end but surely it was slower.
I think I need to be more courage to keep accelerating.