Hongboseong is an old neighborhood Chinese restaurant in Seoul that serves jjajangmyeon, jjamppong, and tangsuyuk as a set. It offers jjajangmyeon along with samseon jjamppong and old-style tangsuyuk, and sacheon tangsuyuk can also be ordered. Food comes out quickly and is served with danmuji, onion, and chunjang, and the business hours are unusual. Parking is difficult.