“We can see that spring, summer, autumn and winter are a matter of time, and that yin and yang are the core elements, but how is the key element? Therefore, how to “nourish” is the essence of the whole theory [1]. In terms of time, the four seasons of the year cover all the time, why is this yin and yang so important? Why is this yin and yang so important and worthy of attention throughout the year? The Inner Classic also says that human or life is “just yin and yang” and “the essence of life is based on yin and yang”, so yin and yang refers to the vital energy, which is the root of life. Therefore, we can conclude that we need to nourish the vital energy all year round. It should be taken from its roots, not to cut its essence. In the four seasons of the year, spring should be born, summer should grow, for Yang; autumn should harvest, winter should hide, for Yin. In order to maintain an active, healthy and energetic spiritual will, the human body has to go through the changes of spring growth, summer growth, autumn harvest and winter storage, and move in accordance with the qi of the four seasons. I think not, first of all, it is true that, as in nature, people should move with the four seasons, but it is not impossible to violate, such as migratory birds of the elderly, with the seasons and the north-south migration of a few, can indeed improve the quality of life; such as chronic bronchitis patients a time difference to shift the location of life, but also can play a good therapeutic role. This therapeutic effect and the improvement of quality of life needless to say is also in the nourishment of the vital energy, also belongs to the category of time health science, but it belongs to the autumn and winter also nourish Yang. Secondly, the relationship between yin and yang in spring, summer, autumn and winter cannot be casually equated with the yin and yang of the human body. It cannot simply correspond to the fact that spring and summer are Yang, so we should raise the Yang of growth, and autumn and winter are Yin, so we should raise the Yin of collection, depending on the state of the human body. If a person is at peace with yin and yang, the problem of nourishing yin and yang in spring, summer, autumn and winter is like the problem of nourishing the yin and yang of the human body, such as the rise and fall of the tide, there is nothing wrong with regulating the balance of yin and yang, while if a patient has an imbalance of yin and yang, there will be problems of deficiency and reality. For example, if a person with Yin deficiency and Yang, nourishes Yang in spring and summer to make Yang more prosperous, committing the commandment of actuality, and vice versa, committing the commandment of deficiency. Furthermore, time health science tells us that its essence is to use the order of time to guide the individual health issues, not mechanically understood as different time must be used to different health methods. Therefore, the ancient people proposed “spring and summer Yang, autumn and winter Yin” problem also has to be explained by the “benefit”, where the benefit of yin and Yang vital energy, all belong to the health, spring, summer, autumn and winter is just a matter of time. Then how to raise it? We can’t help but ask, since yin and yang is the vital energy, both natural “yin and yang secret” in order to “spirit is to cure”, we know that spring, summer, autumn and winter is just a matter of time, why do we need to divide spring, summer, autumn and winter? Since the division of it can be suitable for all people? The answer is obviously no, it is not suitable for all people. Such as the summer Yang Qi Sheng real people, but also favor some “conducive” to the growth of Yang Qi things, is probably not allowed.