| 1988 | SHANGHAI OPENCHEM INTERNATIONAL CO.,LTD.
■■ CHEMICAL TRADING CORP. | | 1997 | SHANDONG OPENCHEM INDUSTRIES LTD.
■■ WATER TREATMENT CHEMICALS | | 1998 | YANGZHOU O&L CHEMICAL CO.,LTD.
■■ PHARMACEUTICALS INTERMEDIATES,API'S & SPECIALTY CHEMICALS | | 1999 | SHANGHAI OPENCHEM LABORATORY CO.,LTD.
■■ R & D | | 2000 | SUZHOU TONGDE CHEMICAL CO.,LTD.
■■ FUNCTIONAL INGREDIENTS FOR COSMETICS & PERSONAL CARE | | 2001 | JIANGSU SHENKAI CHEMICALS CO.,LTD. | | 2002 | SHANDONG OHUA CHEMICALS CO.,LTD.
■■ RUBBER ADDITIVES,FLAME RETARDANTS,ANTIOXIDANTS,UV |
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