CH.Karnchang Public Company Limited (SET: CK) has announced that the company has signed as the Contractor in the Construction Contract for Structural Work, Architectural Work, landscape architectural Work and Building System Work of NAN Art and Culture Center and East Lanna Culture Learning Center located at Mueang Nan District, Nan Province with Rakpanan Foundation Under Royal Patronage of Her Royal Highness Princess Maha Chakri Sirindhorn as the Employer. The estimated contract value is THB522 million.