"Elevator, here are the numbers. Just press a few floors if you live on the floor. For example, we live on the 25th floor. Just press on the 25th floor. After you press it, it will be red, indicating that you have already pressed it!" Liu Ye patiently explained.

"What a miraculous thing. In other words, after pressing it, we won't need to climb the stairs and will directly arrive at the 25th floor!" Father Liu looked up at the man and asked.

"Yes, the elevator is ...