(Enclosure 4) 1 (-Translation-) Information Memorandum on the Connected Transaction and Asset Acquisition of Master Ad Public Company Limited pursuant to Schedule 2 of the Notification of the Board

Fabrication and Other Services. As at 30 June 2019, the Group has backlog for construction service in oil and gas sector totaling of 1,814.43 Million Baht. On 18 July 2019, the Company also notify the project

after-sale services for PCD and PCBN cutting tools with target customers in the automotive, aerospace, oil & gas, and heavy industries in the US and nearby countries Objectives of Investment 1. To

Financial Reporting 5. Transactions and Trends 6. Audit risks related to audit firms 1. Economic Environment Oil and gas prices : impacting not only oil and gas companies but also others with significant

construction service in oil and gas sector totaling of 2,024.99 Million Baht. 3. Selling expense decreased amounting to 5.11 Million Baht, accounting for 80.67% from previous year as the Company record

voting rights 1. PTT Global Chemical Public Company Limited* 340,565,223 22.73 2. PTT Public Company Limited* 338,266,861 22.58 3. Thaioil Power Co., Ltd.* 311,425,457 20.79 4. Thai Oil Public Company

and absolute carbon emissions (induced and avoided) 7, 13 Climate Change Mitigation Science based target initiative (SBTi), TPI, ACT, Sectorial Decarbonisation Approach Oil & Gas - Scope 1-3 GHG

that has continuously awarded since 2017. As at 31 December 2019, the Group has backlog for construction service in oil and gas sector totaling of 2,377.82 Million Baht. 4. Other income increased

since 2018. As at 31 March 2020, the Group has backlog for construction service in oil and gas sector totaling of 2,286.09 Million Baht. 3. Service income from Testing and Inspection service increased

. This included enhancing our relationship with public agencies, both national and international, in anticipation of linkages with regional markets, and reaching out to local businesses of all sizes so