Yang represents the concept of light, brightness, and activity in Chinese philosophy, particularly in the context of Yin and Yang. It embodies qualities such as warmth, energy, and assertiveness, often associated with the sun and daytime. In the Yin-Yang duality, Yang is seen as the active force that complements Yin, which symbolizes darkness and passivity. Together, they illustrate the balance of opposites in nature, emphasizing that both forces are essential for harmony in the universe.