1. A pot of fragrant chicken soup can not only prevent and relieve cold symptoms, but also improve human immune function. 2. Yam can resist arthritis, tonify lung and kidney, tonify kidney and strengthen yin, diabetes, abdominal distension, diarrhea after illness, tonify lung and relieve cough, lower blood sugar, prolong life, resist hepatic coma, nourish kidney and replenish essence, strengthen spleen and stomach, and help digestion.