Zen Corporation Group Public Company Limited 782/1 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND Tel: 02-0195000 18 February 2019 No. ZEN 2562-008 Subject Management Discussion and Analysis for 9

August 11, 2017 Re: Management Discussion and Analysis for the period 3 months June 30, 2017 To: The Registrar, Stock Exchange of Thailand Patkol Public Company Limited : Management Discussion and

688.15 percent.  Revenue from sales and services in amount of Baht 1,074.78 million consisting: - Renewable Energy and Waste Management of Baht 580.15 million, increased from the previous year in amount

year had a gain from temporary investments of 1.5 MB and the remaining of 5.4 MB caused by more efficient management. Please be informed accordingly Your Sincerely, (Miss Vachiraporn Aganapanya) Chief

: EIC-AD020/2019 15 May 2019 Subject: Management Discussion and Analysis for the Performance for Three-Month Period ended 31 March 2019 To: President The Stock Exchange of Thailand The Board of Directors

www.bangkokchainhospital.com บริษัท บางกอก เชน ฮอสปิทอล จ ากัด (มหาชน) Bangkok Chain Hospital Public Company Limited No. BCH.130/2019 9 August 2019 Subject : Management Discussion and Analysis Quarter 2 Ending 30 June 2019 To

: EIC-AD033/2019 13 August 2019 Subject: Management Discussion and Analysis for the Performance for Six-Month Period ended 30 June 2019 To: President The Stock Exchange of Thailand The Board of Directors

: EIC-AD033/2019 13 August 2019 Subject: Management Discussion and Analysis for the Performance for Six-Month Period ended 30 June 2019 (Added Information) To: President The Stock Exchange of Thailand The

: Interim Analysis and Explanation of the Management To: Directors and Managers The Stock Exchange of Thailand Short-term loan from directors As of June 30, 2019, the company had a short-term loan from

investment 16 MB and the remaining decrease of 24.4 MB resulted of efficiency in management. Please be informed accordingly Your Sincerely, (Miss Vachiraporn Aganapanya) Chief Financial Officer