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Cai Yuanchang, serving as the Prefect of Kaifeng, was leaning over his desk when he suddenly felt a sensation like an insect crawling from the sole of his foot up to his waist. He dropped his brush and fainted, regaining consciousness only after a long time. His subordinates said that only Scholar Yu could treat this illness, so they summoned him. Scholar Yu said, "This is true Hong Kong Foot (a condition characterized by swelling, pain, numbness, and weakness in the feet). Moxibustion at Fengshi (GB31) with one moxa cone will cure it." The next day, the patient again felt the sensation crawling from the foot to Fengshi, where it stopped. On the third day, the symptoms returned. Scholar Yu said, "This disease cannot be cured without hundreds of moxa cones; because only one cone was used previously, the vital energy was exhausted, causing the relapse." Consequently, several hundred moxa cones were applied, and the patient recovered. Another patient with numbness in the legs was treated with Fengshi (GB31), Jianyu (SI9), Quchi (LI11), and Zusanli (ST36), and recovered shortly thereafter. (From *Hong's Empirical Formulas*)

Chen Jilao of Huai'an was a Confucian physician. A wealthy man's son suddenly fell ill, perceiving upright objects as slanted. Any items such as desks or books arranged neatly had to be moved until they appeared slanted for him to consider them straight. This extended even to writing letters and characters. His parents were deeply worried and consulted numerous physicians who did not understand the ailment. Upon hearing of Chen Jilao, they brought their son for treatment. After taking the pulse, Chen Jilao instructed the father to leave first, keeping the son behind. He then arranged music and held a banquet, offering unlimited amounts of wine until the son was drunk. The intoxicated patient was placed in a sedan chair, which was carried up and down, often tilting and rolling for a long time, before being allowed to lie down on the bed. By dawn, when the alcohol wore off, he was sent home. Objects that appeared slanted the previous day now appeared straight. His parents were overjoyed and asked for the treatment method. Chen Jilao explained, "Your son has no other illness. During a previous bout of drunkenness, he likely stumbled, causing a lobe of the liver to rest upon the lung and fail to descend, resulting in the perception of slanting upright objects. Now, by making him drunk again, the lungs become distended; during the rolling motion, the liver also drops back into its proper position. How could medicine alone achieve this?" The wealthy man rewarded him generously. (From *Yunlu Mancao*)

At the end of the Yuan Dynasty, there was Lu Fu from Siming, courtesy name Cangzhou Weng, who was deeply versed in medical arts. Daoist priest Xiao Yunquan from Linchuan perceived all objects as inverted and sought treatment from Lu Fu. Lu Fu asked for the cause. Xiao replied, "I once became extremely drunk and vomited everything I had consumed. I slept soundly until morning, and since then, I have suffered from this condition." Lu Fu palpated the pulse, finding the left Guan position floating and rapid, and informed him, "This resulted from excessive drinking and vomiting, causing repeated agitation in the Upper Jiao, leading to the inversion of the Gallbladder organ. Thus, objects appear inverted. This is an internal injury caused by 'neither internal nor external causes' (specifically dietary/lifestyle factors). The appropriate method is to induce vomiting again to correct the position of the gallbladder." Therefore, using coarse powder of Veratrum Viride Rhizome (*Lilu*) and Melon Stalk (*Gua Di*), decocted in water, he administered it in a single dose under supervision, stopping when vomiting occurred. After vomiting, the patient's vision returned to normal. (From *Jiuling Mountain House Collection*)