Police pillow is a kind of pillow. In ancient times, there was a round pillow made of wood, which was actually a small log. When people fall asleep, they are very alert because their heads slide down easily. This round pillow is called a police pillow, and some people say it is a wake-up pillow. In ancient times, I often studied hard.
The Origin and Development of Police Pillows
The appearance of police pillow can be traced back to the pre-Qin period. There are several kinds of artifacts recorded in the Book of Rites, among which there are "vessels". Zheng Xuan explained in the Han Dynasty: "Qi is also a police pillow." Cai Yong, a scholar in Han Dynasty, wrote The Inscription of Police Pillows, which used police pillows to represent things and warned the world to be prepared for danger in times of peace.
After the Han Dynasty, police pillows were generally made of logs. When the pillow turned, people woke up. Some people install bells, and when they move a little, there will be a sound. Think of it as an alarm clock. Lu Guimeng, a poet in the Tang Dynasty, wrote a poem "The Second Rhyme of Mulan Courtyard in the United States": "I miss the old mountain police pillow and cry like a fountain at night."
Sima Guang, a famous historian and writer in the Northern Song Dynasty, read and wrote by candlelight until late at night and got up in the morning to continue writing. He used a police pillow in order not to sleep.