UNOFFICIAL TRANSLATION Readers should be aware that only the original Thai text has legal force and that this English translation is strictly for reference. The SEC, Thailand can neither undertake

operating results that posted a difference greater than 20% from the preceding year To: Director and Manager the Stocks Exchange of Thailand According to the Board of Directors’ Meeting of World Corporation

Page 1 of 4 No. RJH – SET 8/2019 13 May 2019 Subject : Management’s Discussion and Analysis for the First Quarter of 2019 To : The President The Stock Exchange of Thailand Rajthanee Hospital Public

(Translation) NEP-AC 002/2562 15 May 2019 Subject: Management Discussion and Analysis for 1st Quarter ended 31 March 2019 To : The President The Stock Exchange of Thailand Operating Result NEP Realty

1 / 2 No.IR.006/2020 28 February 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

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

1 Zen Corporation Group Public Company Limited 662 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND. Tel: 02-0195000 6 May 2021 No. ZEN 2564-009 Subject Management Discussion and Analysis for the 1st

Provincial Waterworks Authority Attention: Directors and Managers The Stock Exchange of Thailand CC: Secretary-General of the Office of the Securities and Exchange Commission, Thailand Attachment: Map of the

M.D. 088/2020 June 12, 2020 Subject : Disclosure of the information connected transactions To : President of the Stock of Exchange of Thailand Kang Yong Electric Public Company Limited hereby notify

November 13 ,2020 Dear Director and The Manager of SET Re: Clarification on the Operating Result of Quarter 3/2020 Thailand economy’s condition of Quarter 3/2563 was continued to shrink by domestic