There are about 30 or so drugs used in the 13 prescriptions of the Nei Jing, of which Han Xia is one. In Zhongjing’s book, it is used 42 times, ranking 6th. In addition to “sweating”, Zhongjing has a special formula for each of the main treatments mentioned in the Benjing. For example, for the treatment of “typhoid fever”, Da and Xiao Chai Hu Tang, Chai Hu plus Mannitang; for the treatment of “chest distension and coughing”, Xiao Qing Long Tang, She Gan Ma Huang Tang, Yue Han Wu plus Han Xia Tang; for the treatment of “head dizziness”, Xiao Han Xia For “head dizziness”, Xiao Han Xia plus Fu Ling Tang; for “sore throat”, Bitter Wine Soup, Han Xia San and Tang; for “intestinal whimpering”, Han Xia Di Xin Tang; for “lowering Qi”, Ge Gen plus Han Xia Tang, Bamboo Leaf and Gypsum Soup, Mai Men Dong Tang, etc. The “downward qi” treatment is Ge Gen plus Han Xia Tang, Zhu Ye Shi Tang and Mai Men Dong Tang. In summary, Han Xia is an important medicine to harmonize yin and yang, and Mr. Zou Run’an explained it in 4,382 words in his book “The Evidence of this Classic”. 1, can make the person’s vital energy from Yang into Yin “Nei Jing” so-called “Wei Qi line in Yang, not into the Yin, for sleeplessness, drink to half a summer soup, Yin and Yang both through, its sleep immediately to”, is the first record of half a summer for the traffic of Yin and Yang. The Qing Dynasty medical doctor Zou Runan further elaborated: “head for the yang of the meeting, Yang for the yin frame is dazzling; throat for the group of Yin intersection, Yin for Yang fight is swelling and pain. If the intestines sound, Yang has descended but cannot enter; if the Qi is reversed, Yang is ascending but cannot descend. Sweating, Yang added to Yin, Yin is not with Yang and. All of these evidence, do not have to be trivial to seek treatment, but so that Yin does not reject Yang, Yang can enter Yin, Yin and Yang both through, all can be established.” This is the fundamental principle of his belief that the medicine can treat all the above symptoms, that is, the drug can transport yin and yang, “so that the personal positive qi from yang into yin”. He said, “Therefore, the half of the summer is not able to disperse, Yin does not grate Yang, Yang and gas cloth carry on; half of the summer is not able to descend also, Yang can enter Yin, Yin and drink non-stop carry on.” Therefore, that half of the summer can “disperse and eliminate gangrene”, “to lower the rebellion and stop vomiting”, is still only in the surface layer of understanding, has not seen half of the summer has traffic and the effect of reconciling yin and Yang. In fact, this is what it is most worthy of attention and use. 2, half of the summer and the main, can moisten can dry clearly put forward “half of the summer and the main” this argument, is Zou Runan. He was in the interpretation of the 12 formulas named after “big and small”. He first explained the origin of the names of Qinglong Tang, Chaihu Tang, Chihshu Tang, Chengqi Tang, Jianzhong Tang and Hanxia Tang, namely, “Qinglong, the one who makes clouds and rain; Chihshu, the one who destroys the firm and searches for the volcano; Chengqi, the one who matches yin with yang; Jianzhong, the one who maintains the pillar and the common. Is the four sides, named after the work, when the big one is big, when the small one is small. But Chai Hu and Panxia are named after the medicine. Named after the drug, Chai Hu is the main sparse, the main sparse then sparse the big one is big, sparse the small one is small; half of Xia is the main and, the main and and the big one is big, and the small one is small.” The insight of “half of the main and” how unique! It is especially worth pointing out that Zou Run’an has made an in-depth analysis of the comparison of the large and small half summer soup, from the evidence of treatment, disease mechanism, and the role played by the half summer. He said: “small half summer soup is to cultivate the naughty mine and dredge it, so that the angry get Yu; big half summer soup is fertile for the woze and not hair, so that the angry get clock.” Because the two prescriptions, although both disease in the stomach, “the ‘grain can not be down’ vomiting (according to: refers to the small half summer soup evidence), is the stomach rebellious fire, it can be seen that the stomach still has the right; as for the ‘morning food and evening vomiting? Twilight food vomiting, complete grain does not transform’ (press: refers to the large half of the summer soup evidence), the stomach is almost powerless. Therefore, the small half summer soup rob to disperse its fire, the stomach since the peace; big half summer soup will turn the stony soil for fat, with ginseng is not enough, and benefit to white honey, that is, water must also make light and flooding, do not want its nature to rush down to. In addition, Zou Runan also believes that the treatment of abdominal distension and fullness of the thick park, ginger, licorice and ginseng soup “is actually and in the agent, its strength is all in the small half of the summer soup. The use of the half summer, the divine change is extremely carried out”. 3, half of the Xia main middle Jiao Qi rebellion middle Jiao for the meeting place of yin and Yang, “the middle Jiao like compost”, the Division of clearing and lowering the turbidity of the job, the so-called spleen up and stomach down. Although the “Ben Jing” cloud half of the main “down the gas”, but down the gas is not the same as the treatment of vomiting, it can also be treated “under the heart, chest distension, pharyngeal swelling, intestinal tinnitus” and so on. Zou Run’an believes that Han Xia is the main qi rebellion in the middle jiao, not to treat all the qi running in the lungs, that is, “the function of Han Xia down qi, broken in the middle but not in the upper”, “only to make the qi does not rebel from the middle jiao”, so it is different from almonds, Wu Wei Zi, shot dry, calamus and other main upper qi, can make the rebellious qi from the upper jiao and It is not the same as almond, Wu Wei Zi, Radix et Rhizoma Acanthopanax, Calamus and so on, which can make the rebellious Qi descend from the upper jiao. Qi rebellion is also different from deficiency and reality, which is why the three formulas, namely Xiao Han Xia Tang, Han Xia Gan Jiang San, and Ginger Han Xia Tang, which are also composed of ginger and summer herbs, should be applied differently. These three formulas are related to the same disease of vomiting, retching, asthma, but the small half of summer soup evidence (Zhongguo Qi water disobedience, want to rebellion on the top) Qi rebellion and real, so adjuvant to go without guarding the ginger, and summer times than ginger (to the nature of summer strong than the nature of ginger); half of summer dry ginger evidence of Qi rebellion and deficiency, so adjuvant to guard without going dry ginger, and ginger, summer equal, and only take a square inch dagger, but also with a decoction of slurry water to and its nature. And ginger and half summer soup evidence, all in the patient’s will (that is, self-perception, such as asthma, vomiting, retching, etc.), can not only use the method of descending, but must use the main in the nature of the horizontal dispersion of ginger doubled to pound to get its juice, and first decoction of half a summer and after the Na, so “so that the gas of ginger sharp, summer gas mellow, (ginger) dispersion force swift, (summer) descending force is soft, and the small half a summer soup The intent of the soup is the opposite. It can be seen that the same belongs to the nature of the descending half of Xia, because the cut into the appropriate complementary phase and make a difference in the treatment of evidence. 4, half Xia for the treatment of yin evil steal Yang position of the important agent Zhongjing said: “the disease is in the yin and the opposite of down, because of the gang.” Zou Runan believes that the disease is in the yin (non-heat) is always not under. Otherwise, “Yin evil from the outside into the inside, its slip in the lower regardless of their own, their myth in the Yang position, the method of treatment to the half of the summer who returned with it?” This is why it is essential for all the recipes to be able to lower the rebellion and eliminate the gangrene: Han Xia Diarrhea Heart Soup, Sheng Jiang Diarrhea Heart Soup, Gan Cao Diarrhea Heart Soup, and Xuan Yi Dai Ochre Soup, all of which have Han Xia, which is determined by the special nature of the season of Han Xia’s production (born after the opening of the three yangs and becoming a yin only when it is jealous). Zou Runan said: “endowed with this yin and yang between the virtue of slippery and dry all the ability, and why not from the yang into the yin, to cure the evil in the yang position?” (Note: Yang position, should refer to the middle jiao above, including the chest.) In short, half a summer can descend, can disperse, more and more; not only can dry, but also can moisten. It can harmonize the stomach and open up the yin and yang. Since the Nei Jing, this medicine has been used for no less than 2,000 years and still has proven efficacy. It is still very effective today. It is used in such formulas as Huo Xiang Zheng Qi Pill, Bao He Pill, Er Chen Tang, Half Sulfur Pill, and Han Xia Bai Zhu Tian Ma Tang. The author believes that although Han Xia is not a tonic, but if applied properly, it can treat many kinds of diseases, so as to achieve the effect of what Zou Run’an called “Yang and Qi spread”, “Yin and drink without stopping”, “but so that Yin does not reject Yang, Yang can enter Yin. Yang can enter the yin, yin and yang both through, all can stand has” is not a false statement. The one who knows Han Xia is Mr. Run An!