Why does the Beijing subway only operate until 23: 00?

There are three reasons: an underground worker needs a rest after working for one day, and the subway should be overhauled after stopping to ensure normal operation the next day. 2.23 o'clock is not only the limit of the peak of people flow, but also the beginning of less people flow. At this time, it is better to let the staff have a rest, so as to save the waste caused by the empty running of the subway. 3, 23 o'clock is a strange time, feeling creepy, afraid of affecting the driver's mental state, and there are some superstitious sayings, whether it is true or not, in order to be safe, you must stop at 23 o'clock. These three points are the reasons why the Beijing subway only runs until 23 o'clock.