How to distinguish the forward and reverse rotation of UAV motor

Regarding the forward and reverse rotation of the motor, the right-hand spiral rule in electrotechnics (or physics) is followed: the right hand holds the motor shaft, the thumb points in the same direction as the shaft (perpendicular to the first eye), and the direction pointed by the four fingers is the forward rotation direction. Simply put, facing the rotating shaft, the counterclockwise direction is forward rotation, and the clockwise direction is reverse rotation.