How many ancient sayings about "sleep"

In ancient China, it was emphasized that "the sun rises and the sun enters the sun". For the ancients, sleeping is a kind of enjoyment and a science.

As early as the Qin and Han dynasties, people saw the importance of sleep for health preservation. 1972 A number of Han bamboo slips were unearthed from Mawangdui Han Tomb in Changsha, including the medical book Ten Questions, which revealed people's understanding of sleep at that time: "Once you don't lie down, you won't be there for a hundred days."