Report on the increased capital (July - December 2006)

ST.010/2007/0005 January 30th, 2007 Subject: Report on the application of increased capital Attention:The President Stock Exchange of Thailand Sino-Thai Engineering and Construction Public Company Limited, ("The Company"), would like to inform that from July to December 2006, the company received capital from the exercise of STEC-W totaling Baht 4,200, the number of warrants being exercised was 4,200 units. None of STEC-W2 holders exercised the warrants. The increased capital has been used as a working capital for the company business operation. It is therefore informed for your acknowledgement and dissemination to the public and other investors. Yours sincerely, Mr. Woraphant Chontong SEVP. Financial and Administration Division