Page 1 Date 25 February 2020 Re: Management Discussion & Analysis for the Year Ended 31 December 20020 To The President of the Stock Exchange of Thailand (SET) CHAOPRAYAMAHANAKORN PUBLIC COMPANY

February 26, 2020 Subject : Management Discussion and Analysis for year and 4th quarter ended December 31, 2019 Attention : President The Stock Exchange of Thailand 1. Operating Performance 1.1

์จ ำ กดั (มหำชน) Food and Drinks Public Company Limited 1 | P a g e February 27, 2020 Subject: Management discussion and analysis of the operating results for the year 2019 Attn: President The Stock

1 Zen Corporation Group Public Company Limited 662 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND. Tel: 02-0195000 24 February 2020 No. ZEN 2563-003 Subject Management Discussion and Analysis for

the Management Discussion and Analysis (MD&A) as attached herewith. Please be informed accordingly. Yours faithfully, For and on behalf of Diamond Building Products Public Company Limited (Mr. Satid

DOD BIOTECH PUBLIC COMPANY LIMITED 111 Moo 2 TambonThachin, Amphurmuangsamutsakhon, Samutsakhon 74000 Page 1 of 3 No. DOD026/2563 February 26, 2020 Subject Management Discussion and Analysis of for

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

February 28, 2020 Subject: Managing Discussion and Analysis for Year2019 To: Managing Director The Stock Exchange of Thailand The company would like to report to operation results for the company and

ending March 31, 2017 and 2016 consisted of the followings: (Unit: Million Baht) 2017 2016 - Current period income tax 0.55 0.32 - Income tax waiting for amortization (0.03) 0.95 Total 0.52 1.27 Analysis

1 (Translation) MD. 108/2017 Aug 7, 2017 Re: Management Discussion and Analysis For the Operating Results ended June, 2017 To: President The Stock Exchange of Thailand Management Discussion and