Barun Jungsikdang Gukboseong is a small Chinese restaurant in Dunchon-dong serving jjamppong, japchae-bap, and ganjajang. Each dish is stir-fried to order in a wok, and the tangsuyuk is fried and then tossed again with sauce. The dining room holds about four tables, and ganjajang and jjamppong must be ordered for two or more people. One person runs the kitchen, so when orders pile up the wait for food grows long; call ahead to reserve.