Tangyen is a Chinese restaurant in a Seoul alley in Nokbeon-dong that serves tangsuyuk, jjajangmyeon, and jjamppong. It cooks to order, turning out wok-fried bokkeumbap and tangsuyuk with large pieces of lean meat. Lunch and dinner draw crowds, so avoiding peak meal times reduces the wait. The jjajangmyeon sauce is on the thin side.