How to distinguish between left and right when opening the door next to the elevator

Drive to the left, drive to the left. The door next to the elevator is a door that opens from one side to the other and is divided into left and right doors. When waiting for the elevator, open the door to the left when you see it open, and open the door to the right when you open it to the right. Side doors are widely used in elevator doors because of their good flexibility.