Huangdi Neijing, a classic of ancient Chinese medicine in China, puts forward the viewpoint that "essence is not stored in winter, but it will be ill in spring", and Chinese medicine does have the viewpoints of "storing essence in winter", "nourishing yang in spring and summer, nourishing yin in autumn and winter" and "storing essence in winter in autumn". It is believed that restricting couples' sexual life in winter, even abstinence, can keep healthy and live longer. On the contrary, if sperm is not stored in winter, it is easy to get sick in spring. Older people tend to believe this health secret. In fact, many people have a one-sided understanding of the meaning of "essence" mentioned by the ancients. They think that the essence mentioned in the classics of traditional Chinese medicine is semen, but it is not. They think that "essence" is semen, which is only a narrow understanding and should be understood more broadly as: energy, physical strength, immunity and so on.
Tonifying in winter can nourish the viscera, cultivate healthy qi, store the energy transformed from nutrients in the body to the maximum extent, and lay a good physical foundation for the next year's life. Tonifying in the harsh winter of March 9th is a turning point in the year when Yin Qi was extremely abundant and Yang Qi was born. Therefore, for stroke patients, choosing winter tonic can replenish essence and nourish essence, so that when spring gas is generated in the coming year, it will not be triggered by liver wind or external wind, resulting in blood gas disorder.