Joe, who is from the UK, hears about the concept of "preventive treatment", or "Zhi Wei Bing", in traditional Chinese medicine (TCM) for the first time. So, what kind of disease it aims to treat? Join Joe on a visit to the Zhongshan Hospital of Traditional Chinese Medicine, where he undergoes TCM constitution assessment, experiences TCM treatment methods, explores the innovative "integration of body and mind", and discovers how TCM emphasizes "prevention before the onset of illness."