1. According to Huangdi Neijing, luck means moving qi, which is manifested in nature as spring, summer, autumn and winter-spring temperature, summer heat, autumn cool and winter cold, which constitutes the law that everything in nature grows in spring, grows in summer, harvests in autumn and hides in winter. Both the North Pole and the South Pole have yin, so there is no yang and no yin, so it is not suitable for human survival. Because of the alternation of yin and yang in temperate zone, the sulcus gyrus of people living in temperate zone becomes deeper and deeper in the process of rising and contracting, so temperate zone is the most suitable for people to survive.
2, spring, summer, autumn and winter harvest, winter storage. Being in line with the four seasons is the first rule of health preservation, being born in line with the four seasons and dying against the four seasons. We are like deciduous trees outside. In spring, the tree will sprout, all its nutrients will be transferred from the roots to the branches, its strength will be outward from the inside, and the outside will give it a resistance.
Therefore, Chinese medicine believes that the pulse in spring is a string pulse. Chord pulse means that the power inside is going out, and the conditions outside are not ready yet, so the spring pulse is a chord pulse, just like the bud tip that has just sprouted. On the one hand, it requires us to adjust our lives to conform to the laws of the four seasons; On the other hand, especially for middle-aged and elderly people, some drugs can be used to regulate the body according to the season, so as to achieve the purpose of prolonging life.