Data released by the China Sleep Research Society shows that 24.6% of people have substandard sleep and over 90% do not achieve a good level of sleep.

　　01 Sleep time

　　Sleep time is one of the common factors affecting sleep quality. The healthiest way to sleep is: take a nap. "Zi" refers to 23-1 o'clock at night, and "ni" refers to 11-13 o'clock during the day. Sleeping in the "zi time" can nourish your energy, while sleeping in the "noon time" can follow the development of yang energy. The normal sleeping time is 8 to 10 hours. Women should sleep between 10:00 p.m. and 2:00 a.m. for "beauty sleep.

　　02 Sleep environment

　　Sleep environment is also a factor that affects the quality of sleep.

　　Generally speaking, the human body is best suited for a sleep microenvironment with a local temperature of 32℃, a relative humidity of 50% and an airflow speed of 25cm/s. In this microenvironment, the human body will be able to sleep for a long time. In this micro-environment, the human body will feel very comfortable, which effectively extends the time of deep sleep. Bedding softness, comfort is also very important. Mattress softness and hardness should be moderate, the elasticity should also be moderate, is conducive to maintaining the normal S-shaped curvature of the human spine, relieve muscle fatigue.