Zhang, a 35-year-old male, suffered from a warm disease and was treated for two months. Although other symptoms were resolved, he was left with persistent hiccups, unable to eat or drink, and various doctors were at a loss. As a last resort, he was referred to an elderly doctor in Xinmin County for specialized treatment. After examination, the doctor told his family: "This illness has been repeatedly treated with sweating and purgation methods, which have damaged the body fluids and depleted stomach qi. Now, even thin porridge cannot be consumed, let alone medicine." He instructed them to boil rice into a thick soup, mix it with a small amount of American ginseng powder, and take it three times a day. By the fifth day, the hiccups stopped, and he regained his appetite. A doctor named Wei asked the elderly doctor: "Your prescription seems simple and light, yet it cured a serious illness. Can you explain it to us?" The elderly doctor sighed and said: "Doesn't the 'Treatise on Cold Damage Diseases' state, 'For any illness, if sweating, vomiting, purging, blood loss, or fluid exhaustion leads to the spontaneous harmonization of yin and yang, it will heal on its own'? This case involves stomach yin deficiency and depletion of stomach qi. Yin deficiency leads to reduced fluids and qi counterflow, while qi depletion weakens the stomach and causes loss of appetite. Although Bamboo Leaf and Gypsum Decoction might seem appropriate, the stomach is too weak to process it. Instead, using rice soup nourishes the stomach. Grains nourish the stomach better than medicine because they are mild and balanced. Adding a small amount of American ginseng replenishes the stomach's qi and yin. A small dose is effective, while too much would cause stagnation. The treatment had to be light and gentle. What do you think?"