From a historical point of view, it is necessary to determine whether the materials have historical basis and whether they are first-hand materials, which far exceeds the level of scientific and technological development at that time. From biology: it does not conform to the law of cell division, and the level of science and technology is unbelievable. Li Qingyuan (Li Qingyun, 1677-1933), a Sichuanese, was a scholar of traditional Chinese medicine in the late Qing Dynasty and the early Republic of China, and was also a world-famous long-lived old man. From 65438 to 0777, Li Qingyun won a special award from the government for his outstanding achievements in Chinese medicine. He thinks there are three reasons for his health and longevity: first, he has been a vegetarian for a long time; Second, he has always maintained a calm and cheerful heart; Third, he cooks medlar and makes tea all the year round.

He thinks there are three reasons for his health and longevity: first, he has been a vegetarian for a long time; Second, keep your heart calm and cheerful; Three, long-term use of black beans, purslane, celery, honeysuckle, hawthorn, green tea, seaweed, chrysanthemum and so on. It is named "Bai Cao Chang Sheng Fang" to maintain the three links of human blood, urine and stool. This is the secret of Li Qingyuan's longevity for future generations. He always believes that maintaining a calm and peaceful mentality and "three links" are necessary conditions for longevity. Keep a calm mind, sit like a turtle, walk like a bird and sleep like a dog. "This is Li Qingyuan's secret guide to longevity for future generations. His diet is mainly rice and a little wine.

The health care and medicinal use of tea are recorded in Shennong Herbal Classic and Compendium of Materia Medica, but the specific origin of Huazhi tea is unknown, and the historical records should come from Hubei. "Compendium of Materia Medica" records that cassia seed has the effects of clearing heat, purging fire and improving eyesight; Lotus leaf has anti-inflammatory and diuretic effects; Siraitia grosvenorii has the effects of relaxing bowels, clearing throat and moistening lung.

He also talked about matters needing attention in details of life. It has been pointed out that people are often impatient with trifles, which will inevitably damage their health. He warned people: careless changes in temperature, walking too ill, unrestrained, and indulging in excess are all harmful to the body, and extreme damage will lead to death. Therefore, according to the regimen of our ancestors, we should not act rashly, see it soon, don't listen very much, sit tirelessly and lie extremely; You should wear it cold before you wear it, heat it before you untie it, eat it when you are hungry, drink it when you are thirsty, and eat less, but you don't want to eat more; We should have no emotions, no emotions and no thoughts. This is the way to live a long life.

Li Qingyuan finally warned that hunger and cold are painful, and neither parents nor wives can replace them. Only the way of self-love and self-improvement is the criterion and key to health preservation.