When it comes to elevators, do you think modern elevators are smart enough? I personally think that there is room for improvement in the "intelligence" of the elevator, especially when I am in a hurry, the stronger this feeling becomes. Let me illustrate with examples.
You live on the 15th floor, rushing to work in the morning, and hurriedly took the elevator down to the first floor. When you ran to the road, you remembered that there was an important thing you didn't bring, so you turned around and ran to the elevator entrance. Oops! The elevator has been taken away, has reached the 12th floor, and is still rising. What do you do at this time?

No way! You can only press "up", and then endure the irritability and wait obediently for the elevator to come down.
Is this necessary?China passenger elevator company
People can climb the stairs upstairs while the elevator goes down. If the person and the elevator meet on the 5th floor, the time saved is: "the elevator goes down from the 5th floor to the 1st floor" ┼ "the elevator goes from the first floor to the 5th floor" The time spent. The advantage is not only that, if you have something to do (climb the stairs by yourself), you can also relieve the anxiety in your heart. But no way! If you meet the elevator on the 5th floor and you press "up", it will ignore you and it will continue to descend to the 1st floor. Isn't it stupid?
The elevator designer will definitely refute: "If there is such a situation, the elevator will assume that there are different people requesting service. The first person presses on the first floor. Of course, the person on the first floor is served first, and the person on the fifth floor is late. Say some more."
But isn't this easy to solve? As long as the person who presses "up" on the first floor has a way to inform the elevator: "I am in a hurry to go upstairs, and people are about to leave the first floor. Next time, if someone presses "up" between your current floor and the first floor. "You just serve that person."
Isn't that solved?
Just set up more keys. You don't even need to set up more keys. Use the "up" and "down" keys as a combination key, just like the Ctrl and Shift keys on the keyboard. I have designed a similar circuit myself, which should be easy to do.