Why didn't the floors 14 and 18 in the elevator be replaced with 13A and 17A?

Elevator is a kind of vertical elevator powered by motor, equipped with box-shaped pods, and elevator is the general name for vertical transportation in buildings. According to the speed, it can be divided into low-speed elevators (below 1m/s), fast elevators (1m/s) and high-speed elevators (above 2m/s).

Almost all elevators have two floors: 14 and 18 (all elevators are in Shanghai at present). Some people may not use this number because the number 4-7- 14- 17 is unlucky, but many people still have this number, and one of them contains 13A and 65438+.

For example, there is a dragon in the building materials home, which is included in it. I hope you can learn about other elevators.