หนังสือแสดงการรับทราบความผิด 14 May 2020 Subject : Management Discussion and Analysis of the first quarter 2020 ended 31 March 2020 Attn. : Director and Manager The Stock Exchange of Thailand Encls

accordingly Yours sincerely, ( Mr. Santi Piyatat ) Managing Director K.C. Property Public Company Limited

was mainly from decreased of building and equipment expenses. Please be inform accordingly Sincerely Yours, -Mr. Thaveedej Uyawong- (Mr. Thaveedej Uyawong) Director Authorized to sign on behalf of the

Yours, (Mr.Wanthana Jaroennawarat) Director

, ............................................... (Mr. Taksin Tantipijit) Managing Director Firetrade Engineering Public Company Limited

November 13, 2006 May 15, 2020 Subjects : Clarification of Operating Performance for the Q1/2020 Attention : The Director and Manager of the Stock Exchange of Thailand The Consolidated net profit of

Satondee 3. Mr. Jukr Boon-long The Company will nominate its representative to act as the director at the ratio of not less than the investment ratio Shareholding Structure : Shareholders No. of shares % of

Structure : 1. Mr. Thammarat Saengchan 2. General Chaiwat Satondee 3. Mr. Jukr Boon-long The Company will nominate its representative to act as the director at the ratio of not less than the investment ratio

. Sincerely Yours, (Mr.Wanthana Jaroennawarat) Director

Buanoom) Managing Director Well Graded Engineering Public Company Limited