Why are there centenarians in the world? Because they go to sleep on time every night before 23:00 hours. During the Warring States period, the famous doctor Wen Zhi said to King Wei of Qi, “My way of health care puts sleep in the first place, people and animals only sleep to grow, sleep helps the spleen and stomach to digest food, so sleep is the first big tonic for health care, people do not sleep one night, its loss of a hundred days is difficult to recover.” Night belongs to yin, yin main quiet, is a good time for people to sleep, rest at this time, to have a good physical and mental state. This is the same reason that babies who sleep a lot grow fat and fast, while children who love to sleep are stunted. What are the correct ways to sleep? 1, sleep before 23:00. 23:00 to 3:00 a.m. for the son of the ugly time, the gallbladder and liver meridian is the most active time, the liver and gallbladder to return blood, “lie down to return blood, stand up to supply blood.” If you lie down every night around 22 o’clock, quietly enough not to talk, to 23 o’clock, also fell asleep. Liver and gallbladder began to return to the blood, the toxic blood filtered out, produce fresh blood, replacement of bile, so that people are not prone to liver and gallbladder diseases. 2, half an hour before bedtime do not talk. Because talking will make the lung meridian move greatly, and then the heart meridian moves again, people will be easy to enter a state of excitement, so it is difficult to fall asleep. 3, sleep to protect Yang. Sleeping fan, air conditioning can not blow directly on the human body, easily lead to disease. Because the “wind into the tendons, cold into the bones”, if the morning up, the body yellow, yellow face, the back of the neck that tendon hard, bone pain, and even some people began to fever, this is the wind and cold invasion to the tendons and bones in the cause. Therefore, it is best not to open the air conditioner, fan, to protect Yang Qi. 4, sleep to warm limbs. Limbs is the essence of Yang, if the limbs are not warm, is certainly insufficient kidney Yang, should be before going to bed to cover the hands and feet warm, hands and feet and navel, behind the fate of the cover. Soak your feet in hot water for 20 minutes before going to bed is also a way to warm up your body and protect your Yang.