In the East and the West, the eating habit is three meals a day. I don't know when it gradually evolved from mushroom hair to blood enrichment and then to health preservation. China's habit of eating three meals a day can be confirmed by Zhuangzi's statement that "those who are suitable for wild and pale will return home with three meals, and their stomachs are as expected". As early as 400 years BC, people in China had the habit of eating three meals a day. Lu Fangweng, a great poet in the Southern Song Dynasty, said in a poem: "Run faster than white, and make healthy meals with three meals." It can also be explained that the habit of eating three meals a day has been common for thousands of years. As for sprinting beyond the white step, it is equivalent to today's physical exercise. As the saying goes, "walk a hundred steps after dinner and live to ninety-nine." It seems that taking a walk after a meal is good for the digestion of the stomach and the health. But there is a school of Buddhism that only eats one meal a day and never eats again after noon. Because Buddha said it is not his duty to eat after noon, and it is not his duty to eat. Therefore, the Five Lights of the Yuan Dynasty regarded this as a Buddhist law, that is, he did not eat dinner after noon. Huang Tingjian (Gu), a great poet in Song Dynasty, believed in Buddhism. He eats porridge in the morning, at noon and after noon. Tang Bai Juyi's poem "The Master of Longhua Temple" in Changqing Collective 19: "The night is quiet and the forest is afraid, and the spring is hungry." But this is a poem that sympathizes with Buddhist disciples from the heart. But the ancients thought that not eating in the afternoon was also the secret of longevity and health, and that overeating at night was easy to cause disease. Song people have had such a jingle for many years: "You don't sleep at night, you have several dinners." It means sleeping at night. You'd better not sleep with your head covered. Sleeping under a quilt is not good for people's health. As for eating, even if you don't follow the laws of Buddhism-don't eat during the New Year, as long as you don't eat more and eat less. In the Song Dynasty, people avoided the formula and said, "Drink some wine on your birthday. Don't eat after meals. " Here refers to between five and seven o'clock in the morning, while God's fingers refer to between five and seven o'clock in the afternoon. Most people just got up from five to seven in the morning. Drinking as soon as I get up seems at first glance to be out of China people's habit. However, after reading "Changqing Collection" by Bai Juyi, a great poet in the Tang Dynasty, I found that Bai Juyi was just a Shi Mao drinker. He has a poem called "Mao Yin", which praises drinking a glass of wine in the morning and being as happy as a fairy. The poem says, "There is nothing in the world." It seems that I drank a glass of wine and went to sleep from five to seven in the morning. His other poem "Shi Mao Wine" also praised "not as fast as Shi Mao wine, but twice as fast as the skill", and the poem "Drunk Songs" even had such a poem: "After the bell rings at the end of the ear, the wine in my heart has not disappeared." Bai Juyi lived in the Tang Dynasty. According to historical records, people in the Tang Dynasty got up very early and held court sessions at around six in the morning, but he had a glass of wine to sleep in the morning. By noon, the temple had rung the bell, and the wine he was drinking was still drunk. From this point of view, he won't be able to go to work until the afternoon (Bai Juyi was the satrap of Hangzhou at that time). According to notes, people in the Tang Dynasty got up very early. At that time, people invited guests to dinner. The guests all set off for dinner before dawn in the morning, walking on the road, and the moon was still on. Although this can be explained by the inconvenient transportation at that time, it took a lot of time to go to the banquet, but it can also explain the banquet of the Tang Dynasty. Usually before noon, guests will be invited to lunch. Song Supo is not an early riser. Judging from one of his poems "Answer Huang Tingjian and Send Two Poems", "it is decided that Ying Xiao Wo will give birth and sleep at night to smell clothes." Judging from two poems, he was called up from five to seven in the morning and dressed backwards. In addition, literati and scholars often sleep late. There is a sentence in the Song Dynasty's "Shuangliu Poetry" which is a great sympathy for the predecessors' "literati eat until noon, and ginger and shredded vegetables bother them to cook". Han Yu, who has been in decline for eight generations, also said in his reply to Dongye's poem: "The meal moves until noon, and the night satirizes the end." Described the poverty and laziness of the poet Dongye. However, if literati and poets recite poems all night and don't go to bed until five or seven o'clock in the morning, the folks will be spared the trick of "drinking a little wine". Don't eat after lunch ",not surprisingly, the wine before dinner is definitely not the wine you drink as soon as you get up. Modern medicine has proved that what you eat for breakfast is what you need for energy consumption in a day, but when you have a full dinner, the food will not be digested. Therefore, the new maintenance formula is: "Eat well at breakfast (referring to nutrition), eat well at lunch and eat less at dinner." This is an accurate calculation of the relationship between Kalidao and energy, which is similar to the eating habits of ancient people in China. Unfortunately, although overseas Chinese know this, the general eating habit is just "going to dinner and having lunch". Dinner is cooked after coming home from work, and it is very good and full, which is neither in line with the laws of Buddhism nor the way of fitness.