Sadae
Sadae is a neutral Korean term.  It is used in historical contexts.<ref name="armstrong57-58">Armstrong, Charles K. (2007). [https://books.google.com/books?id=_mh4Qv4lAkQC&q=Charles+Armstrong+sadae%27%27&pg=PT69 The Koreas, p. 57-58].</ref>  The term is used as a descriptive label for diplomatic relations between Imperial China and Korea during the Joseon period and earlier.  Sadae describes a foreign policy. It describes the many ways a small country acknowledges the strength of a greater power like that of China.