ACC1/20-012 February 25, 2020 Subject: Management Discussion and Analysis for the year ended December 31, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

AC 52/07-003 ACC1/19-019 May 13, 2019 Subject: Management Discussion and Analysis Quarter 1 Ending March 31, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

ACC6207/003 25 July 2019 Subject Inform the progress of the sale stock in the subsidiary company To Director/ Managing Director The Stock Exchange of Thailand Refer to the company's letter No

AC 52/07-003 ACC1/19-042 August 13, 2019 Subject: Management Discussion and Analysis Quarter 2 Ending June 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

AC 52/07-003 ACC1/18-048 November 12, 2018 Subject: Management Discussion and Analysis Quarter 3 Ending September 30, 2018 To: Director and Managing Director The Stock Exchange of Thailand Qualitech

AC 52/07-003 ACC1/20-030 May 11, 2020 Subject: Management Discussion and Analysis Quarter 1 Ending March 31, 2020 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

AC 52/07-003 ACC1/19-055 November 11, 2019 Subject: Management Discussion and Analysis Quarter 3 Ending September 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech

The Securities and Exchange Commission (SEC), represented by Ms. Nopnuanparn Pavasant, Assistant Secretary-General, Ms. Cholthida Phakdeethai, Director of the Digital Asset Supervision Department

Swangsalee, Director-General of the Department of Older Persons (DOP).During the panel discussion, Mrs. Tosporn Vichienchai, SEC Assistant Director of the Capital Market Education Department, emphasized the

Innovation Agency (NIA), (2) Mr. Chakraphan Hiranwongwira, Service Experience Consultant and Founder, H and Double H Design, (3) Mr. Putthimes Thanarersk, Director of the SEC Digital Asset Enforcement