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

., and Schedule for the EGM of Shareholders No. 1/2019 To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of Assets and

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised2) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised3) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

คำอธิบายและการวิเคราะห์ของฝ่ายจัดการ 8 August 2019 Re: To clarify the financial statements as of 30 June 2019 To: President The Stock Exchange of Thailand WHA Corporation Public Company Limited (the

1 No. ACC 2019/004 13 August 2019 Subject : Management Discussion and Analysis for the three-month and six-month period ended 30 June 2019 To : President The Stock Exchange of Thailand Index Living

from sales and rental and rendering of services (5) Adjustment to earnings are Net gain(loss) on foreign exchange, Impairment gain(loss), Gain(loss) on disposal of assets, Gain(loss) on disposal of

19 - Natural Resources Financial Position Statement of Cash Flows Statement Financial Ratios Environment Management Accounting Management Discussion and Analysis of Business Operation for Q3/2019

Securities and Exchange Commission (the “SEC”), in cooperation with the PricewaterhouseCoopers Thailand (“PwC Thailand”), has developed this internal control sufficiency evaluation form (“evaluation form”) as