[Tai-I] Announcement Regarding the Cumulative Reduction of Shareholding Ratio in Subsidiary 'Shengxin Materials Technology Co., Ltd.' by More Than 10%

1. Name of the important subsidiary, subsidiary deemed to be a listed company under Article 7, Paragraph 3, or subsidiary applying for listing on overseas securities markets: Shengxin Materials Technology Co., Ltd.

2. Cause (Reduction of shareholding ratio or loss of control): Reduction of shareholding ratio.

3. Method of reduction of shareholding ratio (List details for each occurrence): (1) Date of occurrence: March 3, 114 (Capital increase base date) Cause: Non-participation in the cash capital increase of subsidiary Shengxin Materials. Method: Issuance of new shares by Shengxin Materials for cash capital increase. Reduction in shareholding ratio: Tai-I's stake in the company decreased from 47.656% to 42.285%. Shares waived: 393,380 shares Issuance price per unit: NTD 25 per share Total amount waived: NTD 9,834,500

(2) Date of occurrence: May 22, 115 (Tai-I Shareholders' Meeting) Cause: Non-participation in the cash capital increase of subsidiary Shengxin Materials. Method: Issuance of new shares by Shengxin Materials for cash capital increase. Reduction in shareholding ratio: Tai-I's stake in the company decreased from 42.285% to 37.650% (including expected purchases by designated parties). Shares waived: 3,325,830 shares Issuance price per unit: NTD 35 per share Total amount waived: NTD 116,404,050

4. Method of loss of control: Not applicable. Only the shareholding ratio was reduced; control was not lost.

5. Counterparties of the equity transfer: Generally strategic or financial investors who contribute to the operational development of Shengxin Materials.

6. Relationship with counterparties: None.

7. Disposal gain (or loss): Not applicable.

8. Cumulative reduction in shareholding ratio to date: 10.006%

9. Shareholding ratio to date: 37.650%

10. Independent expert opinion on price reasonableness: Accountant Dai Meijuan evaluated and considered the setting of the cash capital increase price to be reasonable.

11. Independent expert opinion on the impact on shareholders' equity: Accountant Dai Meijuan determined there is no adverse impact on Tai-I's shareholders' equity.

12. Impact on the parent company's continued listing: No.

13. Audit Committee resolution date: May 22, 115.

14. Audit Committee resolution content: Approved unanimously by all attending members.

15. Board of Directors resolution date: May 22, 115.

16. Board of Directors resolution content: Approved unanimously by all attending directors.

17. Other matters: None.