The theory of Yin-Yang and the Five Elements in traditional Chinese medicine (TCM) is an essential component of its theoretical framework, representing the integration of ancient Chinese philosophical thought with medical practice. This theory is based on the observations and reflections of ancient Chinese people on the natural world, summarizing the changes of all things in nature into two fundamental concepts: Yin-Yang and the Five Elements. These concepts are then applied to medical practice. Let's explore the mysteries of Yin-Yang and the Five Elements in TCM together.