Public Company Limited 1 | P a g e November 13, 2019 Subject: Management discussion and analysis of the operating results for the quarter 3/2019 Attn: President The Stock Exchange of Thailand Please find

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

1 / 3 No.IR.003/2019 28 February 2019 Re: Notification of the changes of the Profit and Loss Statement To: President Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited

Page 1 Date 13 May 2020 Re: Management Discussion & Analysis for the 3-months period Ended 31 March 2020 To The President of the Stock Exchange of Thailand (SET) CHAOPRAYAMAHANAKORN PUBLIC COMPANY

Page 1 Date 11 November 2020 Re: Management Discussion & Analysis for the 9-months period Ended 30 September 2020 To The President of the Stock Exchange of Thailand (SET) CHAOPRAYAMAHANAKORN PUBLIC

Page 1 No. CMC Sor Lor.013/2019 Date 12 November 2019 Re: Management Discussion & Analysis for the Period Ended 30 September 2019 To The President of the Stock Exchange of Thailand (SET

Baht 81.76 million, whereas net profit of Baht 161.84 million in the same period of prior year, mainly results from; 1. Revenue from sales increased by Baht 103.76 million because the Company has Revenue

MANAGEMENT DISCUSSION & ANALYSIS (MD&A) Q1/2020 Operating performance by plant in Q1/2020 The company’s gross profit was at Baht 5,365 million in Q1/2020 which increased by Baht 766 million or 17% from Q4/2019

THB million % THB million % Revenue from services 1,590.7 100.0% 2,639.7 100.0% 66.0% Costs of services (920.2) (57.9%) (1,682.4) (63.7%) 82.8% Gross profit 670.4 42.1% 957.3 36.3% 42.8% Selling

ที่บชง Page 1 of 4 Ref. Bor Chor Ngor 0154 /2018 10 May 2018 Subject: Management Discussion and Analysis for the First Quarter ended 31 March 2018 To President The Stock Exchange of Thailand Quality