Osan factory	Address : 538-4, Won-dong, Osan-si, Gyeonggi-do, Korea Tel : +82-31-374-2058 / Fax : +82-31-374-4094 site : www.yujinchem.co.kr
Anjung factory	Address : Address: 325-2, Wonjeong-ri, Poseung-myeon, Pyeongtaek-si, Gyeonggi-do, Korea Tel : +82-31-682-4477 / Fax : +82-31-682-8379

Changshin Gas Co., Ltd.	Address : Address: 727-10, Hakjang-dong, Sasang-gu, Busan, Korea Tel : 051-311-5937 / Fax : 051-312-1058 site : www.csgas.co.kr

Changshin Co., Ltd.	Address : 135 Gwangryeocheonnam-ro, Naeseo-eup, Masanhoewon-gu, Changwon-si, Gyeongnam
Haman Factory	Address: 1127-35, Jung-ri, Naeseo-eup, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do, Korea Tel : 055-232-2000 / Fax : 055-231-0001