Deokseonggak is a Chinese restaurant on the second floor of the Deokseong Building, between Dongdaemun General Market and Sinjin Market in Seoul. It sells jjajangmyeon and old-style jjajang separately, and the old-style jjajang with soft potato is its representative menu item. The gochu jjamppong has plenty of seafood and a thick broth. Both the gochu jjamppong and the regular jjamppong are spicy.