May 12, 2018 Subject: Clarification of Operating Results for The three -month period ended March 31, 2018 Attention: President The Stock Exchange of Thailand Further to our submission of the report

14 November 2018 Subject :Management discussion and analysis of financial statement for three-month period ended 30 September 2018 Attention :Director and Manager The Stock Exchange of Thailand The

1 / 4 No.IR.002/2018 22 February 2018 Re: Notification of the changes of the Profit and Loss Statement To: President Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited

(raw material), COGs/revenue ratio of Q1/2019 are at high level. This is because of high stock level carried over Q4/2018.  Increase in cost of sales of are main impact to minus in bottom line. 3 / 4

1 / 2 IR.017/2018 14 August 2018 Re: Notification of the changes of the Profit and Loss Statement To President The Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited (the

, total revenue stood at THB 12,189 mn and net profit stood at THB 1,890 mn). However, the Company implemented the cost-effective management as planned to reduce impact to business performance. As a result

, total revenue decreased by 31.8% and net profit decreased by 65% YoY). However, the Company implemented the cost-effective management as planned to reduce impact to business performance. As a result of

ที่ - Translation - PorBor. 029 / 2018 August 14, 2018 Subject: Clarification of operating results change from the same period last year by more than 20% To: President The Stock Exchange of Thailand

operating results change from the same period last year by more than 20% To: President The Stock Exchange of Thailand Rich Asia Corporation Public Company Limited and subsidiaries would like to clarify the

November 12, 2004 1/5 No: SN. 064/2019 Aug 9, 2019 Subject: Clarification of Operating Results and Financial Status of Quarter 3 ended June 30, 2019 Attention: President The Stock Exchange of