Signed contracts totaling 2.29 Bn.Bht.

Our Ref : ST/010/2002/0019 July 24, 2003 Subject: Signed contracts totaling 2.29 billion Baht 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 second quarter of 2003 the Company signed 7 contracts with total contract value of 2,295.34 Million Baht. The details of the contracts are as follows: 1) Construction of Bridgestone Manufacturing Power Plant - Project Owner: Bridgestone Tire Manufacturing (Thailand) Co., Ltd. - Total Contract Value : Baht 504,620,000 (VAT Included) - Construction Period : 578 days 2) Construction of civil works of IRR Project Contract 1 & 2 - Project Owner: The Department of Rural Highways, Ministry of Transportation - Total Contract Value : Baht 900,940,000 (VAT Included) - Construction Period : 1,020 days 3) The design and construction of flyover bridge across Bangkok - Chonburi motorway at km. 61+152 - Project Owner: AMATA Corporation Public Company Limited - Total Contract Value : Baht 51,000,000 (VAT Included) - Construction Period : 240 days 4) Construction of Operation Center Driven Piles - Project Owner : Thai International Airways Public Company Limited - Contract Value : Baht 66,286,500 (VAT Included) - Construction Period : 121 days 5) Construction Berth upgrade - Project Owner: The Co-Generation Public Company Limited - Total Contract Value : Baht 245,565,000 (VAT Included) - Construction Period : 409 days 6) Construction of perfect place phase 4 - Project Owner: Property Perfect Public Company Limited - Total Contract Value: Baht 188,091,110 (VAT Included) - Construction Period : 240 days 7) Construction of pump station & related works - Project Owner: Royal Irrigation Department - Total Contract Value: Baht 338,841,149.52 (VAT Included) - Construction Period : 750 days Please be advised and disclose to investors and public. Yours sincerely (Ms. Ayuporn Wongkomet) Assistant Vice President Executive Office