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The six Yang pulses and the six Yin pulses are distributed to the left and right hands respectively. The Heart, Small Intestine, Liver, Gallbladder, Kidney, and Bladder are on the left, governing Blood; the Lung, Large Intestine, Spleen, Stomach, Mingmen (Gate of Life), and Sanjiao (Triple Burner) are on the right, governing Qi.
Men conceive through Qi, so Qi is primary; women conceive through Blood, so Blood is primary. If a man has been ill for a long time and the Qikou pulse (Cunkou pulse at the right wrist) is fuller than the Yingying pulse (Renying pulse at the left carotid artery), it indicates the presence of Stomach Qi; although the illness is severe, it is treatable. If a woman has been ill for a long time and the Yingying pulse is fuller than the Qikou pulse, it indicates the presence of Stomach Qi; although the illness is severe, it is treatable. The reverse situation is considered adverse (Ni). Someone might ask: "The Yingying pulse is on the left, and the Qikou pulse is on the right; this is the same for both men and women, with fixed positions. The Pulse Classic states: 'A large pulse on the left suits men, a large pulse on the right suits women.' Why does your statement contradict this?" I reply: "In the entire *Mai Jing* (Pulse Classic), Wang Shuhe earnestly instructs physicians that these left and right hands refer to the physician's position during diagnosis. If interpreted from the patient's perspective, the error would be as vast as a thousand miles!"

Spring implies stirring or awakening. Yang Qi ascends and floats, grasses and trees sprout, stirring into motion. Ancient sages stated that in spring, human Qi resides in the head, and illnesses should be treated with emesis (Tui Fa). It is also said: "The general principle for treating Shanghan (Cold Damage) is to use emesis in spring." The term "Xuan" means to raise or spread. Emesis is described as a method where pathogens exit from the upper body. In contemporary secular practice, people often believe that those with skin sores, chest fullness, or intestinal parasites cannot recover unless they undergo purgation with toxic herbs in spring. Physicians therefore prepare pills using Qian Niu Zi (Pharbitidis Semen), Ba Dou (Crotonis Fructus), Da Huang (Rhei Radix et Rhizoma), Zhi Ke (Aurantii Fructus Immaturus), Fang Feng (Saposhnikoviae Radix), etc., naming them Chun Xuan Wan (Spring Spreading Pill). These are taken in February and March until diarrhea occurs. At the onset of diarrhea, the Zang-Fu organs become unblocked, providing temporary relief. However, one fails to realize that when Qi rises to the upper body, the Yin in the lower body becomes extremely weak. Using purgative drugs damages this Yin, a harm too numerous to describe. Moreover, Zhang Zhongjing used Xia Yao (purgative formulas) like Chengqi Tang only when there was severe fullness, solid excess, dry feces, passing flatus, abdominal urgency, and no exterior syndrome. If the indications for purgation are not fully present, one must wait. How can purgative drugs be tried lightly?
My uncle had a fat body but thin bones, favored strong flavors, and had a deep temperament. At fifty years old, he轻信 (lightly believed others) and suddenly bought a dose of Chun Xuan Wan in mid-March, taking it which resulted in two or three bowel movements. He made this a yearly routine. In his fifty-third year, in early July when the heat was intense, he died suddenly without prior illness. Was this not due to mistakenly treating Chun Xuan as a spring purge, thereby bringing disaster upon himself? To summon from above is called "Xuan"; thus, "Xuan" clearly refers to emesis. Mr. Zhang Hezi has already discussed this in detail; how could ancient sages speak falsely? After careful examination and verification, there is no doubt. Several others have since died from this practice. I highlight this case as a warning for future generations!