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Zongzhi Shi Gongzi was only ten years old. In the sixth month of the Dingchou year, he contracted wind-heat and summer-heat pathogens, presenting with alternating chills and fever, and headache. The pediatrician had already used Gegen Tang (Kudzu Decoction) added with Qianghuo (Notopterygii Rhizoma et Radix) and Fangfeng (Saposhnikoviae Radix) to release the exterior. Later, the chills and fever did not subside; instead, he developed panting and abdominal distension. The physician then employed methods for digesting food stagnation combined with Xiaochaihu Tang (Minor Bupleurum Decoction), but without effect. The patient suffered from coma, rapid breathing, occasional diarrhea, and abdominal pain resembling dysentery, making it unclear what disease this was. Upon examination, the illness had persisted for more than twenty days. The pulse was rapid and forceless; consciousness was confused and chaotic. Palpation of the abdomen revealed intermittent distension and pain. Observation of his spirit showed periods of calmness alternating with restlessness; his hands and feet were sometimes cold and sometimes hot, and he sweated profusely due to deficiency. This occurred because when external pathogens are initially contracted, they can be resolved by medication; however, if they accumulate for a long time without being cleared, and combined with dietary irregularities, the primordial qi (Yuan Qi) may become depleted, causing external pathogens to sink inward. Now, the urgent priority is to rescue the root cause. Li Zhong Tang (Regulate the Middle Decoction) was administered with Guizhi (Cinnamon Twig) and Fuzi (Aconiti Lateralis Radix Praeparata). The abdominal pain and diarrhea decreased abruptly, and his hands and feet became warm. However, the fever did not subside, and urination was scanty and painful. Jin Gui Shen Qi Tang (Kidney Qi Pill from the Golden Cabinet) was then used. After two doses, urination became smooth, but the chills and fever worsened. This indicated that primordial qi was gradually returning, and symptoms were reappearing. In the morning, Liu Jun Zi Tang (Six Gentlemen Decoction) was given with Chaihu (Bupleuri Radix), Gegen (Puerariae Radix), Shenqu (Massa Medicata Fermentata), and Ganjiang (Zingiberis Rhizoma); at night, Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia) was given with Renshen (Ginseng Radix) and Guizhi (Cinnamon Twig). Ten days later, he experienced cold rigors, muscle spasms, upward deviation of the eyes, teeth grinding, and groaning. Everyone believed he was incurable. Chen stated: "This is called 'han zhan' (cold shivering). It signifies that righteous qi is about to recover and accumulated pathogens are attempting to exit; thus, it is an auspicious sign." From 3 PM to 5 PM, he finally broke into a sweat like rain. His limbs became weak, he fell into a deep sleep unable to speak, and could only speak after dawn. However, as deficiency symptoms emerged daily, including tidal fever and sweating, Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction) combined with Jian Zhong Tang (Establish the Middle Decoction) plus Fuzi (Aconiti Lateralis Radix Praeparata) was used. For insomnia, Gui Pi Tang (Restore the Spleen Decoction) was prescribed. For weak primordial qi, Shi Quan Da Bu Tang (Ten Great Tonics Decoction) was used. For abdominal pain and slippery diarrhea, Li Zhong Tang (Regulate the Middle Decoction) and Liu Jun Zi Tang (Six Gentlemen Decoction) were employed. Through such regulation, he recovered after three months. (The medications used in this case do not strictly adhere to standard principles. Studying Ye Tianshi's *Wen Re Lun* [Treatise on Warm-Heat Diseases] will make this clear.)

Jiang Zhongfang treated a child living in a water pavilion. Wind and rain arrived suddenly, causing both fright and cold exposure. Subsequently, his four limbs became cold, spreading gradually to the entire body, except for the area around the heart which remained slightly warm. This was a condition of cold wind penetrating the bones; if the cold reached the heart pit, death would ensue. Li Zhong Tang (Regulate the Middle Decoction) with one qian of Fuzi (Aconiti Lateralis Radix Praeparata) was used. After several doses, the cold receded.

Nie Jiuwu treated the second son of Si Maoli, aged eleven. At night, he suddenly developed high fever, headache, and body ache. Everyone assumed it was heatstroke. Upon inquiry and careful pulse diagnosis, Nie determined it was actually cold pathogen contraction. He stated that sweating must be induced. The family doubted this because the child was currently sweating profusely. Nie said: "This sweat is pathological and should not be counted as normal; medication must be used to induce sweating to eliminate the disease." A large dose was prescribed to be taken hot to induce sweating. By dawn, all symptoms had subsided. Clearing and resolving agents were then administered, and after several doses, the patient stabilized. The prescription consisted of: Qianghuo (Notopterygii Rhizoma et Radix) and Fangfeng (Saposhnikoviae Radix) each 6 fen; Chenpi (Citri Reticulatae Pericarpium) and Gancao (Glycyrrhizae Radix et Rhizoma) each 3 fen; Xiong (Chuanxiong Rhizoma) and Baizhi (Angelicae Dahuricae Radix) each 4 fen; Chishao (Paeoniae Radix Rubra) 5 fen; Xiangru (Moslae Herba) and Gegen (Puerariae Radix) each 1.2 qian; Cangzhu (Atractylodis Rhizoma), Ziyè (Perillae Folium), and Xiangfu (Cyperi Rhizoma) each 8 fen; and 3 slices of Shengjiang (Zingiberis Rhizoma Recens).