The elevator in West Germany shows that the parking motherboard is not reversed.

First of all, Tzu Chi considers locking the ladder.

Then consider the fire action, regardless of other things, 80% lock the elevator, and the property saves electricity. When you turn the key on the first floor of the elevator, it will close. You can see that there is a keyhole on the elevator button on the next floor, and then there are two instructions to stop while running, that is, to run and stop. Let's see which way his keyhole faces.