Ophiopogon japonicus is a very commonly used traditional Chinese medicine for nourishing yin, and its efficacy and functions mainly include: 1. Clearing heart and relieving restlessness, which is suitable for heart heat, internal heat disturbing the heart, fever invading the camp, body heat at night, irritability and other symptoms. People who are upset and thirsty due to heat, people who are tired from sweating, people who are deficient in heart yin, people who are upset and insomnia, and people with less red tongue and fur. Second, nourishing yin and moistening lung, yin deficiency and lung dryness, dry cough, dry cough and hemoptysis. Third, benefit the stomach and promote fluid production, and treat diseases such as insufficient stomach yin, dry tongue, thirst, anorexia and hunger. Ophiopogon japonicus can also be used to treat patients with intestinal dryness and constipation due to yin deficiency.