Hongdukkae Son Kalguksu Cheongnyangni is a market-style noodle shop near Cheongnyangni Station in Seoul that serves kalguksu, hand-pulled jjajangmyeon, and kimchi mandu. The kalguksu uses an anchovy-based broth with noodles made in-house at varying thicknesses. Customers order and pay in advance because of the crowds, and solo diners may be seated at a shared table. Lines form on public holidays.