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Management Discussion and Analysis for Interim Business Operations 2019 % 2018 % Inc./(Dec.) % Construction Income 150.24 92.91 21.63 87.82 128.61 594.59 Service Income 9.70 6.00 0.41 1.66 9.29

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1 Translation CEN 012-2019 May 14, 2019 Subject Management discussion and analysis for business operation Quarter 1-2019 To The Manager and President The Stock Exchange of Thailand For 3 months

Management Discussion and Analysis for Interim Business Operations 2019 % 2018 % Inc./(Dec.) % Construction Income 44.36 86.52 35.57 96.14 8.79 24.71 Service Income 5.94 11.59 0.00 0.00 5.94 #DIV/0

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