SIGNED CONTRACTS

Our Ref : ST/2002/0348 July 22, 2002 Subject: Signed contracts Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited (STECON) is pleased to inform the SET that in the month of June 2002 the Company signed 4 contracts with total contract value of 344 Million Baht. The details of the contracts are as follows: 1) Construction of Highway No. 304 Minburi - Chachengsao Inbound Route. - Project Owner: Department of Highway - Signing Date : 25 June 2002 - Total Contract Value : Baht 167,633,690 (VAT Included) 2) Additional work for the construction of Polycarbonate plant in the area of installation and erection of piping system, air ventilation and water system. - Project Owner : Mitsubishi Kakoki Kaisha, Ltd. - Signing Date : 19 June 2002 - Additional Contract Value : Baht 109,170,000 (VAT Included) - Total Contract Value : Baht 245,030,000 (VAT included) 3) Construction of Chachengsao Reservoir (2nd Stage). - Project Owner: Eastern Water Resources Developmemt and Management PLC. - Signing Date : 17 June 2002 - Total Contract Value : Baht 53,376,497.34 (VAT Included) 4) Additional work for the construction of Polyester plant in the area of equipment erection. - Project Owner: Thai Polyester Company Limited. - Signing Date : 3 June 2002 - Additional Contract Value : Baht 14,000,000 (VAT Included) - Total Contract Value : Baht 562,331,888 (VAT included) Please be advised and disclose to investors and public. Yours sincerely (Ms. Ayuporn Wongkomet) Executive Office Manager