1. Reinforce the middle energizer: The old duck in the old duck Wubai decoction has the effects of nourishing yin, nourishing the stomach, invigorating qi and strengthening the spleen, and can supplement the nutrients needed by the human body and enhance the body's immunity.

2. Clearing lung-heat and relieving cough: The white radish, lily, lotus seeds and other ingredients in Old Duck Wubai Decoction have the effect of clearing lung-heat and relieving cough, which is helpful to relieve cough and expectoration.