Five unsolved mysteries?

The history of toilets can be traced back to the Han Dynasty. At that time, the toilet was called nothing, which was dedicated to the emperor. Legend has it that it is made of jade. It was held by eunuchs who served the emperor specially for the convenience of the emperor at any time. Later, in the Tang Dynasty, because there was a man named Li Hu in the royal family, he changed his name to Beast or Maiden in order to avoid taboo. Later, in the circulation, it evolved into the name of the toilet.

Elevator is also a means of transportation, which comes from taking a car, taking a train and flying. And habitually called the elevator. "Sit" here means "ride". If you say take the elevator, it will cause misunderstanding. This is just an established language habit, such as taking a taxi, which no one really does.