-1- AIT (VP-SEC) 018E/2018 August 9, 2018 Subject: Management's Discussion and Analysis of Operating Results for Q2-2018 To: The President of The Stock Exchange of Thailand Summary of Operations Q2

operations of the Group The Group has principally engaged in distribution of product and equipment, design, assembly and installation, and maintenance service of pure water treatment system; including operate

-1- AIT (VP-SEC) 035E/2023 November 7, 2023 Subject: Management's Discussion and Analysis of Operating Results for Q3-2023 To: The President of the Stock Exchange of Thailand Summary of Operations Q3

compared to same period of previous year which had profit of 0.13 Million Baht by following details: Analysis of results of operations (1) Income In Quarter 2-2018 the company and its subsidiaries has total

income tax because high proportion of the increase in profit before income tax expense was derived from subsidiaries’ promoted operations, which were exempt from corporate income tax. Profit for the year

-1- AIT (VP-SEC) 025E/2023 August 10, 2023 Subject: Management's Discussion and Analysis of Operating Results for Q2-2023 To: The President of the Stock Exchange of Thailand Summary of Operations Q2

-1- AIT (VP-SEC) 026E/2020 August 10, 2020 Subject: Management's Discussion and Analysis of Operating Results for Q2-2020 To: The President of The Stock Exchange of Thailand Summary of Operations Q2

November 8, 2017 Reference no. RWI /RY/061/2560 Subject : Management’s Discussion and Analysis of Business Operations of the Third Quarter of 2017 Dear The Director and Manager of the Stock Exchange

minimized loss from the operations result compare with the same period of previous year with the significant detail as follows; 1. Operating Results Revenue In the 1st Quarter of 2018, the Company’s sales

)  2020  (01/01/20  -31/12/20)  2019  (01/01/19  -31/12/19)  Accounting Type Consolidate Consolidate Consolidate Consolidate Consolidate Revenue From Operations 1,264.03 1,106.54 2,289.03 2,061.85 1,206.02