Seongsanok Jonggak is a Korean restaurant in the basement level 1 of Gran Seoul near Jonggak Station in Seoul, serving Pyeongyang naengmyeon and hanwoo yukhoe bibimbap. Ordering the naengmyeon together with the yukhoe bibimbap is the standard combination. At lunchtime a wait forms, and the eobok jaengban takes a little longer to cook. Tables are paid for at a kiosk.