Janganseong is a Chinese restaurant in Eunpyeong-gu, Seoul, serving jajangmyeon, jjamppong, and tangsuyuk. The menu also includes haemu jjamppong, samseon jjamppong, yangjangpi, and ganjajang. It is open 24 hours a day, every day of the year, and discounts apply to each menu item when paying in cash. The regular jjamppong and regular jajang are less satisfying than the samseon jjamppong and ganjajang.