, Nhge An, Vietnam To: President The Stock Exchange of Thailand On 28 May 2018, WHAUP Nghe An Joint Stock Company (“WHAUP Nghe An JSC”), an indirect subsidiary of WHA Utilities and Power Public Company

., has opened the 9th branch of Café Amazon for Chance, which employs baristas with hearing disability, at the SEC Building. In addition, the SEC and the Stock Exchange of Thailand has co-launched the

1 No. CC20180203ELE February 23, 2018 Subject Report of the Resolutions of Board of Directors’ Meeting No.1/2018 To President The Stock Exchange of Thailand The Board of Directors of Cal-Comp

Translation Subject: Disclosure of Financial Assistance to Affiliated Company To: President The Stock Exchange of Thailand The Board of Directors of Eastern Water Resources Development and Management

No. INGRS035 22nd November 2019 Subject : Notification on the Establishment of a Subsidiary Company To : The President The Stock Exchange of Thailand Ingress Industrial (Thailand) Public Company

Ref: AC.037/2019 23 December 2019 Subject Notification of the resolutions of the Board of Directors’ Meeting No.7/2019 (Additional) To President and Managers The Stock Exchange of Thailand Forth

1 / 2 No.IR.018/2020 14 May 2020 Re: Notification of the changes of the Profit and Loss Statement To: President Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited (the

securities, the terms “ warrant ” “ execise of rights under warrants ” “ institutional investors ” “ registration statement ” “ parent company ” “ subsidiary company ” “ executive ” “ major shareholder ” and

securities, the terms “warrant” “execise of rights under warrants” “institutional investors” “registration statement” “parent company” “subsidiary company” “executive” “major shareholder” and “controlling

“warrant” “execise of rights under warrants” “institutional investors” “registration statement” “parent company” “subsidiary company” “executive” “major shareholder” and “controlling person” shall have the