15 May 2017 Subject: Management Discussion & Analysis for Quarter 1 ending 31 March 2017 To: The President The Stock Exchange of Thailand Harn Engineering Solutions Public Company (“The Company

ที่ BCH No. BCH.174/2017 15 August 2017 Subject : Explanation of the change in operating results of Q2/2017 which exceed 20% To : The President The Stock Exchange of Thailand Bangkok Chain Hospital

ที่ BCH No. BCH.211/2017 8 November 2017 Subject : Explanation of the change in operating results of Q3/2017 which exceed 20% To : The President The Stock Exchange of Thailand Bangkok Chain Hospital

10 November 2017 Subject: Management Discussion & Analysis for 3th quarter ending 30 September 2017 (Rev1) To: The President The Stock Exchange of Thailand Harn Engineering Solutions Public Company

1 - TRANSLATION - VS/PC (Q-Con) 004/2018 February 1st , 2018. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for year 2017 Quality

-controlling Interests 122.92 93.17 29.75 31.9 Profit Attributable to Owner of the Company before exchange rate 5,654.23 6,008.06 (353.83) (5.9) Gain (loss) on exchange rate 452.47 157.66 294.81 187.0 Profit

February 22, 2018 SET-18-AC-001 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for the year ended 31 December 2017 According to the resolution of BKD’s

ที่ BCH No. BCH 018/2018 26 February 2018 Subject : Explanation of the changes in operating results for the year ended 31 December 2017 which exceed 20% To : The President The Stock Exchange of

Subject: Clarification of 3rd Quarter 2019 operating results that posted a difference greater than 20% from the preceding year To: Director and Manager the Stocks Exchange of Thailand World corporation

than 20% To : President The Stock Exchange of Thailand Global Service Center Public Company Limited (“the Company”) would like to inform that the Company has already disclosed financial statements for