November 13, 2017 The President & Director, The Stock Exchange of Thailand (SET) LETTER OF CLARIFICTION: CENTEL’s Q3/2017 & YTD 9 MONTHS /2017 OPERATING PERFORMANCE RESULTS This is to inform the SET

1 Ref. No. IVL 007/08/2017 9 Aug 2017 The President The Stock Exchange of Thailand Subject: Submission of Quarterly Reviewed Financial Statements and the Management Discussion and Analysis of

1 Ref. No. IVL 006/11/2017 9 Nov 2017 The President The Stock Exchange of Thailand Subject: Submission of Quarterly Reviewed Financial Statements and the Management Discussion and Analysis of

Purchase Agreement for Hin Kong Power Project in Hin Kong Sub-district, Muang District, Ratchaburi Province with Electricity Generating Authority of Thailand. The agreement is effective from the execution

(Source: The board of investment of Thailand). The overall global aviation industry in 2018, passenger traffic increased by 6.5 percent in revenue passenger kilometers (RPK) where Asia-Pacific region had

funding for its own production. This is to maintain market share and to meet demand for HRC local customers. However, the domestic steel industry has been affected by a trade war between China and the

process and try to obtain new funding for its own production. This is to maintain market share and to meet demand for HRC local customers. However, the domestic steel industry has been affected by a trade

equity amounted to THB 14,143 million increased by THB 925 million or 7% higher from year ended 2018 mainly due to: 1. From registered increased share capital and received cash (net of discounted on

ที่ กตพ Ref. DBP. 030 / 2019 February 20, 2019 Subject : Clarification on Operating Results of Year 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited

Stock Exchange of Thailand Enclosure 1. Information Memorandum on acquisition of all shares in Nam San 3A Power Sole Co., Ltd. and Nam San 3B Power Sole Co., Ltd of BCPG Public Company Limited to invest