ThinTech Materials Technology Co., Ltd. announced retirement of chairman. Date of the board of directors resolution or date of occurrence of the change:2023/10/31, Position (Please enter chairperson or president/general manager): chairperson, Name of the previous position holder: HUANG,CHUNG-CHIA, Resume of the previous position holder: CHAIRMAN OF THINTECH MATERIALS TECHNOLOGY CO.,LTD. Circumstances of change: retirement. New Chairman will be announced after the election in recent board meeting.