Exhibit 13.1  Certification by the Chief Executive Officer  Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002  In connection with the Annual Report on Form 20-F of Chunghwa Telecom Co., Ltd. (the “Company”) for  the year ended December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the  “Report”), I, Shyue-Ching Lu, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U. S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:  (1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act  of 1934; and  (2) The information contained in the Report fairly presents, in all material respects, the financial condition  and results of operations of the Company.  Date: April 20, 2011  Shyue-Ching Lu Chairman and Chief Executive Officer By: Name: Title: 15