The Chinese herb "Bai Qian" (Willowleaf Swallowwort Rhizome or Cynanchum Root) possesses various therapeutic effects and functions in Traditional Chinese Medicine (TCM), including clearing heat and resolving phlegm, moistening the lungs to relieve cough, calming wheezing, promoting diuresis to reduce edema, and clearing heat to detoxify.

1. Clearing Heat and Resolving Phlegm: Bai Qian is cold in nature and can eliminate heat pathogens from the body. It provides relief for symptoms such as excessive phlegm and cough caused by heat pathogens.

2. Moistening the Lungs to Relieve Cough: Bai Qian nourishes and moistens the lungs, offering effective relief for cough and dry cough resulting from lung dryness.

3. Calming Wheezing: Bai Qian has the ability to calm wheezing and is beneficial for symptoms such as shortness of breath and difficulty breathing caused by the upward rebellion of lung qi.

4. Promoting Diuresis to Reduce Edema: Bai Qian promotes water movement and reduces swelling, making it suitable for conditions like bodily edema and inhibited urination due to water-dampness retention.

5. Clearing Heat to Detoxify: Bai Qian also clears heat and resolves toxicity, providing supportive treatment for symptoms such as skin sores, ulcers, and sore throat caused by internal accumulation of heat-toxins.

In daily life, Bai Qian can be used as a dietary therapy ingredient, incorporated into soups or herbal teas to help alleviate the aforementioned conditions. However, caution is advised as Bai Qian is cold in nature. Individuals with a cold constitution or weak spleen and stomach should use it sparingly. It is recommended to consult a professional TCM practitioner before use to ensure safety and efficacy.