Hongjjajang Dangsan is a neighborhood Chinese restaurant in Dangsan, Seoul, serving jjajangmyeon, jjamppong, and tangsuyuk. Its jjajang sauce is red and somewhat spicy, and its jjamppong broth contains a lot of ingredients. Customers choose and pay for their menu at a self-service machine, then the owner cooks and family members serve. The taste is ordinary.