Mien is a term that refers to a person's demeanor or appearance, particularly how they express their emotions and personality through their facial expressions and body language. It can convey confidence, friendliness, or other traits, influencing how others perceive an individual. In some contexts, Mien is also associated with the Mien people, an ethnic group primarily found in southern China and Southeast Asia. They have a rich cultural heritage, including unique traditions, language, and customs that reflect their history and social structure.