Wang, female, 38 years old, visited in July 1983. In the midst of midsummer, the patient still wore thin cotton clothes, complaining of aversion to wind and spontaneous sweating. She felt a bone-chilling wind when slightly undressed, with cold sweats all over her body, and discomfort when more than 5 meters away from an electric fan. She had taken a large amount of Aconite Lateral Root and other warming medicines without effect. She reported being prone to external contraction, having a poor appetite, lack of strength, a pale tongue with thin coating, and a slow, fine pulse. The syndrome was identified as qi deficiency and nutrient-defense disharmony. She was treated with the original formula of Cinnamon Twig Decoction. After taking 5 doses, the patient switched to wearing woolen clothes. With further adjustments to the prescription, after taking more than 10 doses, the spontaneous sweating was cured.