Mrs. Natamon Bunnak, Deputy Governor (Finance) on behalf of Mass Rapid Transit Authority of Thailand (MRTA) participated in signing the book of blessing to the Queen Mother in occasion of HM birthday of 2023 on Saturday 12^th August 2023 at Sahathai Samakom Pavilion, Grand Palace where Mr. Chayatan Promsorn, Permanent Secretary of Transport led heads of organizations under to participate.