The Ancient Art of Sleep: China's Forgotten Rules for Restful Nights China's ancient rules for sleep protection and better quality of rest have been around for centuries.
Some customs still observed today involve mirrors, scissors, and walnuts, which may seem quaint but hold deeper significance in the way ancient Chinese culture approached sleep.
The concept of "yin" and "yang," opposing forces that govern the body's energy, provides insight into why sleep was considered crucial.