Bao Seoul Seongsu is a Taiwanese restaurant in Seongsu, Seoul, serving bao, Taiwanese beef noodles, and dongpo pork rice bowls. The classic bao fills soft, chewy buns with meat and vegetables, and the beef noodles come in a broth that is sour with a mild spice. The small space is decorated with dim lighting and Taiwanese retro interiors. There is a wait even on weekdays.