Report on investing in Autoclaved Aerated Concrete Project

Ref: ST/010/2004/0042 February 2, 2004 Re: Report on Resolutions adopted at the Executive Board of Meeting No.7/2004 To: The President The Stock Exchange of Thailand Whereas, the Executive Board of Sino-Thai Engineering & Construction Public Company Limited convened the Executive Board Meeting No. 7/2004 on January 30, 2004. The Company would like to report the resolutions adopted at the said meeting that Sino-Thai Engineering and Construction Public Company Limited has its plan to invest in the Autoclaved Aerated Concrete Project by establishing Autoclaved Aerated Concrete Product Company Limited. Its detail is as attached. It is therefore, informed for your acknowledgement and dissemination to the public and other investors. Sincerely Yours, Mr. Woraphant Chontong (SVP) Finance and Accounting Division