Signing contract

ST. 010/2010/0037 August 5th, 2010 Subject: Signing contract Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited is pleased to inform the SET that the company has signed a new contract. The details of the project are as follows: Project Name: Construction of Highway No.217 Route A.Piboonmangsaharn - Chongmeg Section 2 between km. 68+100 to 86+630 approximately totaling 18.53 km. (Contract signed on July 30th, 2010) Project owner: Department of Highway Contract value: 609,845,800.- Baht (Include VAT) Scope of work: Asphaltic Road 4 lanes, distance about 18,530 m. Including lighting work Construction period: 31 July 2010 - 20 May 2012 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 Company Secretary Office Telephone: 0 2610 4900 ext. 212, 274 Facsimile: 0 2259 4427