Jeongtong Sonjjajang is a Chinese restaurant in Busan. Noodles are pulled by hand to order and served in jjajangmyeon, ganjjajang, and jjamppong, and the restaurant also sells tangsuyuk. It is not a delivery-only business, and the space for eating in is kept in order. In the jaengban jjajang, the seafood comes out undercooked and cold on the inside.