1 Ref: CK-19-0000-AFD(AC)-L-0054 November 14, 2019 Subject: Clarification on Operating Result and Financial Position for the nine-month ended September 30, 2019 Attention: President The Stock

หนังสือแสดงการรับทราบความผิด 27 February 2020 Subject : Management Discussion and Analysis of the year ended 31 December 2019 Attn. : Director and Manager The Stock Exchange of Thailand Encls. : A

RP-AC 002/2019 May 14, 2019 Subject Clarification of the operating results for the first quarter of 2019 To Directors and Managers of the Stock Exchange of Thailand Richy Place 2002 Public Company

: President The Stock Exchange of Thailand CH. Karnchang Public Company Limited (“the Company”) and its subsidiaries would like to clarify the consolidated operating result and financial position for the three

results for the six-month period of 2019, change of rate more than 20 percent Dear Director and Manager The Stock Exchange of Thailand According to the resolution of the Board of Directors of DOD Biotech

Attention: President The Stock Exchange of Thailand CH. Karnchang Public Company Limited (“the Company”) and its subsidiaries would like to clarify the consolidated operating result and financial position for

1 Ref: CK-18-0000-AFD(AC)-L-0039 August 14, 2018 Subject: Clarification on Operating Result and Financial Position for the six-month ended June 30, 2018 Attention: President The Stock Exchange of

IDH-AC-000-อส6302/30.00 20 February 2020 Re: Management Discussion and Analysis Operating results for the year ended 31 December 2019 To: President The Stock Exchange of Thailand Overview of the

discussion and analysis for the year ended December 31, 2018 To Director and Manager of the Stock Exchange of Thailand Referring to the submission of the audited financial statements of Wiik & Hoeglund Public

- Translation - 10 November 2017 Subject: Management’s Discussion and Analysis for the Operating Results of the 3 rd Quarter of 2017 Attention: The President of the Stock Exchange of Thailand Exotic