SIGNED CONTRACTS

Our Ref : ST/2002/0185 April 12,2002 Subject:Signed contracts Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited (STECON) is pleased to inform SET that between February 25 - March 31, 2002 the Company signed 3 contracts with total contract value of 416.10 Million Baht. The details of the contracts are as follows: 1) Construction of collecting system and waste water treatment plant for Sakon Nakorn Municipality. - Project Owner: Sakon Nakorn Municipality - Signing Date: 29 March 2002 - Total Contrct Value: Baht 252,400,000.00 (VAT Included) 2) Construction of sewage system, collecting system and waste water treatment plant for Chieng Rai Municipality. - Project Owner: Chieng Rai Municipality - Signing Date: 29 March 2002 - Total Contract Value: Baht 147,900,000.00 (VAT Included) 3) Procurement, fabrication, installation, testing and commissioning of steam pipeline and condensate return. - Project Owner: Industrial Power Co.,Ltd. - Signing Date: 25 February 2002 - Total Contract Value: Baht 15,800,000.00 (VAT Included) Please be advised and disclose to investors and public. Yours sincerely, (Ms. Ayuporn Wongkomet) Executive Office Manager