In winter, the temperature is low, the cold is heavy, the physiological function of human body decreases, and the yang is getting weaker, which requires higher energy and nutrition. The way of health preservation is more important than keeping warm from cold and improving disease resistance. At this time, it is advisable to drink black tea such as Qihong and Dianhong and black tea such as Pu 'er and Liubao. Black tea is sweet in taste and rich in protein. Drinking it in winter can tonify the body, store yang, generate heat and warm the abdomen, thus enhancing the adaptability of the human body to the winter climate.

Black tea is also rich in protein, which can strengthen the body's complement. Dry black tea is black, and the leaves are red and the soup is red after soaking. It is mellow and dry, and milk and sugar can be added, but the fragrance remains unchanged. In addition, in winter, people's appetite increases, eating greasy food increases, and drinking black tea can also get rid of greasy food, stimulate appetite and help keep healthy, so that the human body can better adapt to changes in the natural environment. Black tea has almost the effect of black tea.