양 (Yin) is a fundamental concept in Chinese philosophy and Taoism, representing the passive, receptive, and nurturing aspects of existence. It is often associated with qualities such as darkness, femininity, and coolness. Yin is one half of the Yin-Yang duality, which illustrates how opposite forces are interconnected and interdependent in the natural world. In the context of traditional Chinese medicine, Yin is linked to bodily functions that promote rest, nourishment, and stability. A balanced Yin is essential for overall health, as it counteracts excessive Yang energy, which is characterized by activity, heat, and assertiveness. Understanding Yin helps in achieving harmony within oneself and with the environment.