-9320 1 Ref: PLC.2020/005 March 9, 2020 Subject : Dividend payment and the connected transaction and schedule of the 2020 Annual General Meeting of Shareholders To : President, The Stock Exchange of

of the Board of Directors Meeting No. 2/2019 and the convening of the 2019 Annual General Shareholders Meeting To President Stock Exchange of Thailand Reference Letter to the President of the Stock

the Connected Transaction and Scheduling of Extraordinary General Meeting of Shareholders No. 1/2017 Attention : The President of the Stock Exchange of Thailand Enclosure: Information Memorandum on the

into the Connected Transaction and Scheduling of Extraordinary General Meeting of Shareholders No. 1/2017 Attention : The President of the Stock Exchange of Thailand Enclosure: Information Memorandum on

Connected Transaction and the Scheduling of the Extraordinary General Meeting of Shareholders No. 1/2019 Attention : The President of the Stock Exchange of Thailand Enclosure : Information Memorandum on

-9320 1 Ref: PLC.2020/005 March 9, 2020 Subject : Dividend payment and the connected transaction and schedule of the 2020 Annual General Meeting of Shareholders (Amendment) To : President, The Stock

/ Company Tax ID : 0107545000021 (1) To disclose information on the disposal of assets to the Stock Exchange of Thailand; (2) Send letter of notification to shareholders regarding the assets disposition of

relation to reasonableness of the connected transaction and fairness of valuation and conditions of the Transaction for shareholders’ approval including submit such opinion to the SEC Office and the Stock

determination of record date and the date of 2020 Annual General Meeting of Shareholders) To: President The Stock Exchange of Thailand Attachment: 1. Financial assistance to KT Medical Service Company Limited 2

334.30 300.90 Premium (Discount) on Share Capital 743.49 743.49 561.2 167.08 Other Surplus (Deficit) - - - - Retained Earnings (Deficit) 370.91 318.09 197.71 240.14 Treasury Stock - - - - Shareholders