Public Company Limited (the “Company”)’s Board of Directors’ Meeting No. 9/2017 held on October 8, 2017 at 1.00 pm, at the Company registered office No. 1 TP&T Building 14th Floor, Soi Vibhavadi Rungsit 19

higher ratio on a year-on-year basis was attributable to the Company has some costs in personnel and system that prepared to new hospital building. Selling expenses The Company booked selling expenses

from construction contracts 611.83 414.35 197.48 47.66 - EPC Service 25.13 41.23 (16.10) (39.05) - Structure Mechanic and Pinging (SMP and E&I Services) 291.40 152.55 138.85 91.02 - Civil & Building

and legal consultancy fee Depending on the level of complexity of service. 7. Construction and renovation of existing building Depending on the design, building size, required materials and technique

Year Receive Date Details DIAMOND BUILDING PRODUCTS PUBLIC COMPANY LIMITED 2022 30/03/2023 DIAMOND BUILDING PRODUCTS PUBLIC COMPANY LIMITED 2021 22/03/2022 DIAMOND BUILDING PRODUCTS PUBLIC COMPANY

within March 2018. After that the Company will select the outsource for designing the building and systems accordingly. Also, the construction of the new project will start in February 2019. 2. Name of

Center of the Company. Building construction such as Printing plant, Warehouse, Distribution office, Chemical store, and Small power plant with average usable life of 13 years. Other constructions are

Center of the Company. 5/11 Building construction such as Printing plant, Warehouse, Distribution office, Chemical store, and Small power plant with average usable life of 13 years. Other constructions are

Period As Of Details QUALITY CONSTRUCTION PRODUCTS PUBLIC COMPANY LIMITED 2023 Reviewed Company Q2 30/06/2023 QUALITY CONSTRUCTION PRODUCTS PUBLIC COMPANY LIMITED 2023 Reviewed Consolidated Q2 30/06/2023

ended December 31, 2018, respectively. The figures represent a year-on-year increase of 29.02% due mainly to an activating new hospital building. Cost of hospital operations The cost of hospital