Sadae
Sadae (lit. 'dealing with the great') is a Korean term which is used in pre-modern contexts. Sadae is a Confucian concept, based on filial piety, that describes a reciprocal hierarchical relationship between a senior and a junior, such as a tributary relationship. The term is used as a descriptive label for bilateral foreign relations between Imperial China and Joseon dynasty Korea. Korea's concept of  sadae toward China was implemented after the Confucianization of Korea in the early Joseon dynasty.