หนังสือแสดงการรับทราบความผิด 27 February 2020 Subject : Management Discussion and Analysis of the year ended 31 December 2019 Attn. : Director and Manager The Stock Exchange of Thailand Encls. : A

Microsoft Word - 2017_Q2 Results Notification letter_English August 8, 2017 The Director and Manager The Stock Exchange of Thailand Re: Information on Second Quarter of 2017 Operating Results KCE

: Clarification for the three month period ended June 30, 2017 operating results. To Director and Manager of the Stock Exchange of Thailand Referring to the submission of the reviewed financial statements for

Director and Manager of the Stock Exchange of Thailand Ubis (Asia) Public Company Limited (“the Company”) would like to clarify on the performance and the financial status which had changed over 20 percent

informed accordingly. Sincerely yours, ( Mr. Tradsin Chongussayakul ) Chief Executive Officer and Acting Managing Director T Engineering Corporation Public Company Limited

Microsoft Word - 2017_Q3 Results Notification letter_English November 7, 2017 The Director and Manager The Stock Exchange of Thailand Re: Information on Third Quarter of 2017 Operating Results KCE

of Baht 119.18 million, and comprehensive income (loss) in the amount of Baht 136.90 million. Please be informed accordingly. Sincerely yours, (Mr. Tradsin Chongussayakul) Chief Executive Officer and

หนังสือแสดงการรับทราบความผิด 28 February 2018 Subject : Management Discussion and Analysis of the year ended 31 December 2017 Attn. : Director and Manager The Stock Exchange of Thailand Encls. : A

. Sincerely yours, (Mr. Tradsin Chongussayakul) Chief Executive Officer and Acting Managing Director T Engineering Corporation Public Company Limited

for the three-month period ended March 31, 2019 To: Director and Manager of the Stock Exchange of Thailand Referring to the submission of the reviewed financial statements for quarter 1/2019 of Wiik