Old Son Jjajang Jjamppong Mandu is a Chinese restaurant in Dal-dong, Ulsan, near a Kookmin Bank branch. It serves old-style jjajang and jjamppong made with hand-pulled noodles, along with gunmandu and tangsuyuk. Cooking starts as soon as an order is placed, and the tangsuyuk comes with the sauce already poured over it. The hand-pulled noodles are sometimes cooked unevenly, and the dumpling wrappers are on the thick side.