CH. Karnchang Public Company Limited notified the Stock Exchange of Thailand that the Company has signed as the Contractor in the Contract for maintenance and improvement of the civil works of the Udon Ratthaya Expressway with Northern Bangkok Expressway Company Limited as the Employer per the details of works as follows: Execution Date: January 15, 2024, Estimated Contract Value: THB 402,009,730 (excluding value added tax), Operation Periods: Approximately 12 months.