ThinTech Materials Technology Co., Ltd. announced change of representative of legal person director. Date of occurrence of the change: 2023/10/31, Name of legal person: GAINS INVESTMENT CORPORATION, Name of the previous position holder:HUANG,CHUNG-CHIA, Resume of the previous position holder: CHAIRMAN OF THINTECH MATERIALS TECHNOLOGY CO.,LTD. Name of the new position holder: LEE, CHAO-HSIANG, Resume of the new position holder: PRESIDENT OF DRAGON STEEL CORPORATION. Reason for the change: Reassignment of representative of legal person director Original term: 2023/06/16~2026/06/15.

Effective date of the new appointment:2023/11/01.