CLARIFICATION ON THE SELLING OF MODISON MAINTENANCE CO.,LTD.

Our Ref : ST /1999/0600 June 29,1999 Subject : Clarification on the selling of Modison Maintenance Co.,Ltd Attention : President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited has convened a Executive Committee Meeting No.18/1999 during 9.00 hour - 10.00 hours, on June 29, 1999. The company would like to inform the SET that the following concluded resolution was adopted at the said meeting : - The Company sells the Modison Maintenance shares for 899,895 shares at the total price of 8,998.95 Baht (Eight thousand nine hundred ninety eight baht and ninety five stang) to CTMC Co.,Ltd. who does not have any related business with the Company in accordance with the SET Regulation. In addition, the transaction size is also not over than the calculation measurement of the SET regulation. The purpose of the selling is to utilize the money as working capital of the Company. Please be advised and disclose to investors and public. Very Truly Yours, Sino-Thai Engineering & Construction Plc. ( Mr. Teeraphong Wichiranon ) Vice President Business Development Department