Contract Siging of thte construction of Pak Kret Tunnel

ST. 010/2005/0072 July 19th, 2005 Subject: Contract Signing of the Construction of Pak Kret Tunnel at the Highway Junction number 306 (Tiwanond Rd.) and number 304 (Chang Wattana Rd.) Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited is pleased to inform the SET that on 19th July 2005, the Company signed contract of the Construction of Pak Kret Tunnel at the Highway Junction number 306 (Tiwanond Rd.) and number 304 (Chang Wattana Rd.) Project. The owner of the project is Department of Highways. The Company's scope of works includes the construction of Pak Kret tunnel at the highway junction. The construction period is 540 days. The value of Sino-Thai scope of works is 419,148,489.55 Baht(Include VAT.). 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