After beginning of autumn, from the point of view of seasonal health, autumn is the most suitable for nourishing the lungs. After beginning of autumn, everything in nature is the gradual collection of Yang and the gradual extension of Yin, and the metabolism of Yin and Yang in human body naturally enters a transitional period. Therefore, in autumn, in terms of diet conditioning, we should first follow the principle of "nourishing yin in autumn and winter" proposed in Huangdi Neijing, that is to say, we should eat more foods that nourish yin and moisten dryness to prevent autumn dryness from damaging yin. In hot and dry areas in autumn, we should also pay attention to moistening dryness and nourishing yin while invigorating qi. However, autumn tonic can't be supplemented indiscriminately. Only by knowing your own physique can you make supplements according to your symptoms.