Our Ref: No.V. 030 /2019 November 14,2019 Subject : Explanation for operation of third quarter of year 2019 Attn : Managing Director The Stock Exchange of Thailand Enclosed please find the financial

Our Ref: No.V. 029 /2020 August 14,2020 Subject : Explanation for operation of second quarter of year 2020 Attn : Managing Director The Stock Exchange of Thailand Enclosed please find the financial

E280218 Our Ref: TL001/18 February 28, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President Dear Sir

Our Ref: TL015/02 Our Ref: TL011/18 May 14, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President Dear

accounting principles. Moreover, the auditor was unable to find sufficient supporting evidence to satisfy the audit procedures due to limitation on scope of audit imposed by the PICNI management in various

of small-sized gas cylinders and record allowances for impairment in accordance with generally accepted accounting principles. Moreover, the auditor was unable to find sufficient supporting evidence to

* Note Please find further information in the consolidated financial statements. 1 9th May, 2018 Subject: Management Discussion & Analysis (MD&A) for the 1st quarter of 2018 Attention: The President

* Note Please find further information in the consolidated financial statements. 1 9th May, 2019 Subject: Management Discussion & Analysis (MD&A) for the 1st quarter of 2019 Attention: The President

* Note Please find further information in the consolidated financial statements. 1 8th August, 2019 Subject: Management Discussion & Analysis (MD&A) for the 2nd quarter of 2019 Attention: The

* Note Please find further information in the consolidated financial statements. 1 7th August, 2018 Subject: Management Discussion & Analysis (MD&A) for the 2nd quarter of 2018 Attention: The