Session Chairman or Conference Chairman：

l4th International Conference on the Technology of Plasticity, 1993, Beijing, China (1993-10)

l7th International Conference on Steel Rolling, 1998, Chiba, Japan (1998-11)

l6^th Asia Pacific Conference on Materials Processing (APCMP 2003) (2003-09)

l7^th Asia-Pacific Symposium on Engineering Plasticity and its Applications (AEPA’04) (2004-09)

l10^th International Conference on Advances in Materials and Processing Technologies,  7-11 Oct. 2007, Daejeon, Korea (AMPT2007) (2007-10)

l9th International Conference on Technology of Plasticity (ICTP2008), September 7–11, 2008, Gyeongju, Korea. (2008-09)

l11th Advances in Materials and Processing Technologies (AMPT2008), Nov. 2-5, 2008, Bahrain. (2008-11)

l4th Internatinal Conference on Tube Hydroforming, September 6-9, 2009, Kaohsiung, Taiwan (Conference Chair) (2009-09)

l13th Internatinal Conference on Metal Forming, September 19-22, 2010, Toyohashi, Japan (2010-09)

l5th Internatinal Conference on Tube Hydroforming, July 24-27, 2011, Nobori-betsu, Hokkaido, Japan (2011-07)

l10th International Conference on Technology of Plasticity (ICTP2011), September 25–30, 2011, Aachen, Germany. (2011-09)

lConference Co-Chair in NSC-RFBF Taiwan-Russia Joint Symposium: Deformation and fracture in technological Processes. May 28 – 30, 2012, Moscow, Russia. (2012-05)

l11^th Asia-Pacific Symposium on Engineering Plasticity and its Applications (AEPA’12), December 5 – 7, 2012, Singapore. (2012-12)

l6th Internatinal Conference on Tube Hydroforming, August 25-28, 2013, Jeju, Korea. (2013-08)

l3th Taiwan-Japan Joint Workshop (TJWS2013), September 25 – October 2, 2013, Kaohsiung, Taiwan (Workshop Chair) (2013-09)

l9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes (NUMISHEET 2014), January 6-10, 2014, Melbourne, Australia. (2014-01)