Seongmi Sikdang is a mackerel haejang-guk restaurant in Jeju-si. The mackerel haejang-guk comes out spicy and tastes similar to chueotang, and the restaurant also sells samchi hoe and squid (hanchi) mulhoe. It takes a break from 15:00 to 17:00, and an order of two servings comes with ganjang gejang as a side dish. Seasoned grime remains on the new water cups, so the hygiene is lacking.