Dongabanjum is an old Chinese restaurant on the second floor near Seoul City Hall. It serves basic dishes such as jjajangmyeon, chadol jjamppong, and tangsuyuk. On weekday lunchtimes, office workers crowd in, so there can be a short wait, and you have to climb a small staircase. The tangsuyuk comes with the sauce already poured over it and the portion is on the small side.