효(孝) means "filial piety" or "filial duty." In other words, 효 means to honor and serve one's parents. The Chinese character for 효 is a combination of 노(老), which means "old," and 자(子), which means "son." The character symbolizes a son carrying an elderly parent on his back. Transporting an elderly parent on one's back was once considered a typical act of filial piety in Korea and other Asian countries.