[C SUN] Announcement regarding ex-dividend date and related matters

1. Date of Board of Directors/Shareholders' Meeting resolution or company decision: 115/05/22 2. Type of ex-rights/ex-dividend: Ex-dividend 3. Type and amount of common stock dividend: Cash dividend of 5.5 NTD per share, totaling 837,579,628 NTD 4. Ex-rights (ex-dividend) trading date: 115/06/18 5. Last transfer date: 115/06/22 6. Start date of transfer suspension: 115/06/23 7. End date of transfer suspension: 115/06/27 8. Ex-rights (ex-dividend) record date: 115/06/27 9. Bond last conversion application date: 115/05/29 10. Bond conversion suspension start date: 115/06/01 11. Bond conversion suspension end date: 115/06/27 12. Common stock cash dividend payment date: 115/07/13 13. Other notes: (1) The conversion suspension period for the company's 2nd and 3rd unsecured convertible bonds is from 115/06/01 to 115/06/27. Bondholders who wish to apply for conversion must complete the procedure at their securities firm by 115/05/29. (2) While maintaining the dividend of 5.5 NTD per share, if the distribution amount needs adjustment due to changes in shares participating in the distribution, the Board authorizes the Chairman to handle it. (3) Fractions of cash dividends less than 1 NTD will be transferred as revenue to the company's Employee Welfare Committee.