2012

• DEC.Established Pouya Jam Polymer. Co. (J/V in Iran)

2008

• JAN.Development Nano Technology (CSN-88)
• MAY.Development PE WAX Purifying Technology

2005

• JUL.Established Woodflex Lanka (Pvt) Ltd. (J/V in Sri Lanka)

2001

• NOV.Established Qatar additive Co. (J/V in Qatar)

2000

• JAN.Development of Wood Plastic Composite Products (Woodflex)

1999

• JUL.Established Hanbec Corporation
• DEC.Established Ceylon Polymer (PVT) Ltd ( J/V in Sri Lanka)

1998

• OCT.Established Pooya Polymer Tehran (J/V in Iran)
• DEC.Established Enerplastic LLC. (J/V in U.A.E)

1994

• JUN.Development of Super Fiber Reinforced Plastics Compound

1989

• JUL.Established P.T.Halim Samudra Interutama (J/V in Indonesia)
• NOV.Reward 10 Million USD Export Record Certificate (Cho Yang)

1987

• OCT.Established Choil Synthesis Co., Ltd (CISCO)
• NOV.Reward 5 Million USD Export Record Certificate (Cho Yang)

1986

• SEP.Established Cho Yang Fine chemical Co., Ltd

1985

• MAY.Established Central R&D Institute

1976

• FEB.Renamed Cho Yang Heung San Co., Ltd

1967

• JAN.Established Dong-A Chemicals Co., Ltd