Nourish the kidney in winter. The cold weather in winter belongs to water and governs the kidney meridian, which is a good opportunity to nourish kidney qi. Therefore, we should eat more black food with heavy taste, such as fungus, black beans and sesame seeds. Eat more Liuwei Dihuang Pills, tonify qi and blood, and drink more Shenbao to help men thrive. Kidney storing essence is the foundation of storing essence. Kidney essence is related to the whole process of human life growth, development and reproduction. Kidney governs bone, produces marrow, and the marrow is connected with the brain, which is related to the function of the human brain.