남선

Etymology
Abbreviation of. Allegedly originates from during the, when was still the common name for Korea.

Noun

 * 1)  South Korea, the southern regions of Korea

Usage notes
In modern Yanbian, seems to have displaced any other terms when referring to the South Korea as a country. Even in this excerpt the speaker uses the word when referring to the Gyeongsang dialect, the most widespread southern dialect spoken among ethnic Koreans in China, indicating that it's use to denote something that comes from the southern regions of the Korean peninsula might still exist among older residents of Yanbian.