DONG SUNG is a Korean agency for Tokyo Ohka Kogyo (TOK) Co., Ltd. providing electronic materials for the semiconductor and display, as well as total process tools, and a professional engineering company embodying timely sales responses and a comprehensive service system.   DONG SUNG is also focusing its efforts on localizing items, such as PAD for the semiconductor CMP, to list itself as a venture company on KOSDAQ and does its best to cultivate professional engineers with the most up-to-date technologies.