[Subject: To announce the differences between the second quarter of 2015 financial statements under Taiwan-IFRSs and IFRSs To which item it meets: Article 4.1.(47) Statement: 1. Date of occurrence of the event: 2015/8/12 2. Cause of occurrence: To announce the differences between the second quarter of 2015 financial statements under International Financial Reporting Standards as adopted by ROC (“Taiwan-IFRSs’) and] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Six Months Ended June 30, 2015 and 2014 and Independent Auditors’ Review Report - 1 - INDEPENDENT AUDITORS’ REVIEW REPORT The Board of Directors and Stockholders Chunghwa Telecom Co., Ltd. We have reviewed the accompanying consolidated balance sheets of Chunghwa Telecom Co., Ltd. and subsidiaries (“the Company”) as of] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Six Months Ended June 30, 2015 and 2014 - 1 - CHUNGHWA TELECOM CO., LTD. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (In Millions of New Taiwan Dollars) June 30, 2015 December 31, 2014 June 30, 2014 Amount % Amount % Amount % ASSETS CURRENT ASSETS Cash and cash equivalents] [Chunghwa Telecom Co., Ltd. Bo Yung Chen Chief Financial Officer 2 Description 99.1 To announce the differences between the second quarter of 2015 financial statements under Taiwan-IFRSs and IFRSs 99.2 99.3 Consolidated Financial Statements for the Six Months Ended June 30, 2015 in accordance with International Financial Reporting Standards issued by the International Accounting Standards Board (“IFRSs”) 3 6-K 1]

[Chunghwa Telecom holds investor conference for the second quarter of 2015 operation results Date of events: 2015/07/17 Contents: 1. Date of the investor conference: 2015/07/30 2. Time of the investor conference: 16:00 3. Location of the investor conference: Teleconference 4. Brief information disclosed in the investor conference: Please refer to http://www.cht.com.tw/chtir at 15:30 on July 30, 2015 Taipei time 5.] [Announcement of the estimated damage caused by Typhoon Soudelor on the Company’s telecommunication facilities Date of events: 2015/08/10 Contents: 1. Date of occurrence of the event: 2015/08/10 2. 3. Relationship to the Company (please enter ”head office” or ”subsidiaries”): head office 4. Reciprocal shareholding ratios: N.A. 5. Name of the reporting media: N.A. 6. Content of the report: N.A. 7.] [Chunghwa Telecom announces its operating results for July 2015 Date of events: 2015/08/10 Contents: 1. Date of occurrence of the event: 2015/08/10 2. 3. Relationship to the Company (please enter ”head office” or ”subsidiaries”): head office 4. Reciprocal shareholding ratios: N.A. 5. Name of the reporting media: N.A. 6. Content of the report: N.A. 7. Cause of occurrence: Chunghwa Telecom] [Chunghwa Telecom August 10, 2015 This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of Jul 2015 1) Sales volume (NT$ Thousand) Period Items 2015 2014 Changes Jul Net sales 18,657,024 18,431,048 (+)225,976 (+)1.23%] [FORM 6-K August 11, 2015 Chunghwa Telecom Co., Ltd. ——————————————————————————————————— Room 110, Finance Department of Headquarters, 21-3 Hsinyi Road, Sec. 1, Taipei, Taiwan ——————————————————————————————————— x x n/a Chunghwa Telecom Co., Ltd. Bo Yung Chen Bo Yung Chen Chief Financial Officer Description 99.1 Announcement on 2015/07/17 : Chunghwa Telecom holds investor conference for the second quarter of 2015 operation results 99.2]

[Chunghwa Telecom Reports Un-audited Consolidated Operating Results TAIPEI, Taiwan, R.O.C. July 30, 2015 — Chunghwa Telecom Co., Ltd. (TAIEX: 2412, NYSE: CHT) (“Chunghwa” or “the Company”) today reported its un-audited operating results for the second quarter of 2015. All figures were prepared in accordance with Taiwan-International Financial Reporting Standards (“Taiwan-IFRSs”) on a consolidated basis. (Comparisons throughout the press release, unless] [FORM 6-K July 30, 2015 Chunghwa Telecom Co., Ltd. ——————————————————————————————————— Room 110, Finance Department of Headquarters, 21-3 Hsinyi Road, Sec. 1, Taipei, Taiwan ——————————————————————————————————— x x n/a Chunghwa Telecom Co., Ltd. Bo Yung Chen Bo Yung Chen Chief Financial Officer Description 99.1 Press Release to Report Un-audited Consolidated Operating Results for the Second Quarter of 2015 6-K 1 htm_9618.htm LIVE]

[Major resolutions of 2014 Annual General Meeting Date of events: 2015/06/26 Contents: 1. Date of the shareholders’ meeting: 2015/06/26 2. Important resolutions: (1)Ratification of 2014 business report and financial statements. (2)Ratification of 2014 profit allocation proposal. The cash dividend is NT$4.8564 per share. (3)Approval of the amendment to the ”Articles of Incorporation”. 3. Endorsement of the annual financial statements (indicate] [To announce the record date for dividend distribution Date of events: 2015/06/26 Contents: 1. Date of the resolution by the board of directors or shareholders’ meeting or decision by the Company: 2015/06/26 2. Type of ex-rights or ex-dividend (please enter: “Ex-rights”, ¡¨Ex-dividend”, or ”Ex-rights and dividend”): Ex-dividend 3. Type and monetary amount of dividend distribution: To be distributed with cash] [Chunghwa Telecom announces its operating results for June 2015 Date of events: 2015/07/10 Contents: 1. Date of occurrence of the event: 2015/07/10 2. 3. Relationship to the Company (please enter ”head office” or ”subsidiaries”): head office 4. Reciprocal shareholding ratios: N.A. 5. Name of the reporting media: N.A. 6. Content of the report: N.A. 7. Cause of occurrence: Chunghwa Telecom] [Chunghwa Telecom July 10, 2015 This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of Jun 2015 1) Sales volume (NT$ Thousand) Period Items 2015 2014 Changes Jun Net sales 19,138,399 18,764,178 (+)374,221 (+)1.99%] [FORM 6-K July 13, 2015 Chunghwa Telecom Co., Ltd. ——————————————————————————————————— Room 110, Finance Department of Headquarters, 21-3 Hsinyi Road, Sec. 1, Taipei, Taiwan ——————————————————————————————————— x x n/a Chunghwa Telecom Co., Ltd. Bo Yung Chen Bo Yung Chen Chief Financial Officer Description 99.1 Announcement on 2015/06/26 : Major resolutions of 2014 Annual General Meeting 99.2 Announcement on 2015/06/26 : To announce]

[The board of directors resolves to participate in the bid of 2500MHz and 2600MHz frequency bands of Mobile Broadband business license Date of events: 2015/05/11 Contents: 1. Name and nature of the subject matter (if preferred shares, the terms and conditions of issuance shall also be indicated, e.g. dividend yield): The 2500MHz and 2600MHz frequency bands of Mobile Broadband business] [To announce the differences of 2015 financial statements between under Taiwan-IFRSs and under IFRSs Date of events: 2015/05/12 Contents: 1. Date of occurrence of the event: 2015/05/12 2. Cause of occurrence: To announce the differences between the first quarter of 2015 financial statements under International Financial Reporting Standards as adopted by ROC (“Taiwan-IFRSs’) and International Financial Reporting Standards as issued] [The procurement for 4G LTE expansion in 2015 Date of events: 2015/05/18 Contents: 1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): The 4G LTE Expansion in 2015 2. Date of the occurrence of the event: 2015/05/18 3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit] [The Company to participate in investor conference held by Goldman Sachs Date of events: 2015/05/18 Contents: 1. Date of the investor conference: 2015/05/27~2015/05/28 2. Time of the investor conference: 9:00AM 3. Location of the investor conference: Hong Kong 4. Brief information disclosed in the investor conference: The conference will be held by Goldman Sachs 5. http://newmops.tse.com.tw/ The presentation of the] [Announcement of acquisition of Fubon Financial Holding Co., Ltd.- Corporate Bonds Date of events: 2015/06/01 Contents: 1. Name and nature of the subject matter (if preferred shares, the terms and conditions of issuance shall also be indicated, e.g. dividend yield): Fubon Financial Holding Co., Ltd. 1st Unsecured Corporate Bond issued in 2010 2. Date of occurrence of the event: 2015/06/01~2015/06/01] [Announcement on 2015/06/03 : The Company acquired the bid of outsourcing project of National Taxation Bureau of Kaohsiung to provide online VAT refund service for foreign tourists Date of events: 2015/06/03 Contents: 1. Date of occurrence of the event: 2015/06/03 2. 3. Relationship to the Company (please enter ”head office” or ”subsidiaries”): head office 4. Reciprocal shareholding ratios: N/A 5.] [Chunghwa Telecom announces its operating results for May 2015 Date of events: 2015/06/10 Contents: 1. Date of occurrence of the event: 2015/06/10 2. 3. Relationship to the Company (please enter ”head office” or ”subsidiaries”): head office 4. Reciprocal shareholding ratios: N.A. 5. Name of the reporting media: N.A. 6. Content of the report: N.A. 7. Cause of occurrence: Chunghwa Telecom] [Chunghwa Telecom June 10, 2015 This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of May 2015 1) Sales volume (NT$ Thousand) Period Items 2015 2014 Changes May Net sales 18,850,952 18,625,167 (+)225,785 (+)1.21%] [FORM 6-K June 10, 2015 Chunghwa Telecom Co., Ltd. ——————————————————————————————————— Room 110, Finance Department of Headquarters, 21-3 Hsinyi Road, Sec. 1, Taipei, Taiwan ——————————————————————————————————— x x n/a Chunghwa Telecom Co., Ltd. Bo Yung Chen Bo Yung Chen Chief Financial Officer Description 99.1 Announcement on 2015/05/11 : The board of directors resolves to participate in the bid of 2500MHz and 2600MHz]

[Subject: To announce the differences between the first quarter of 2015 financial statements under Taiwan-IFRSs and IFRSs To which item it meets: Article 2 paragraph 47 Statement: 1. Date of occurrence of the event: 2015/05/12 2. Cause of occurrence: To announce the differences between for the first quarter of 2015 financial statements under International Financial Reporting Standards as adopted by] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Three Months Ended March 31, 2015 and 2014 and Independent Auditors’ Review Report 1 INDEPENDENT AUDITORS’ REVIEW REPORT The Board of Directors and Stockholders Chunghwa Telecom Co., Ltd. We have reviewed the accompanying consolidated balance sheets of Chunghwa Telecom Co., Ltd. and subsidiaries (“the Company”) as of March 31,] [Chunghwa Telecom Co., Ltd. and Subsidiaries Consolidated Financial Statements for the Three Months Ended March 31, 2015 and 2014 -1- CHUNGHWA TELECOM CO., LTD. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (In Millions of New Taiwan Dollars) March 31, 2015 December 31, 2014 March 31, 2014 Amount % Amount % Amount % ASSETS] [Chunghwa Telecom Co., Ltd. Bo Yung Chen Chief Financial Officer 2 Description 99.1 To announce the differences between the first quarter of 2015 financial statements under Taiwan-IFRSs and IFRSs 99.2]