Ummyeongwan Starfield COEX Mall is a Chinese restaurant inside COEX Mall in Seoul that serves wuyuk tangmyeon and jjamppong. The wuyuk tangmyeon comes with a rich broth, bok choy, and meat, and the gunmandu is served crisply grilled. The dining area is not large, so the lunch line is long, and arriving before 11:30 avoids the queue. The broth is on the salty side.