Miss Jiranan Vorachak, Assistant Governor on behalf of Mass Rapid Transit Authority of Thailand (MRTA) participated in signing the book of blessing to Princess Sirivannavari Nariratana Rajakanya in occasion of HRH 36th birthday anniversary on Sunday 8th January 2023 at Sahathai Samakom Pavillion, the Grand Palace where Mr. Chayatham Promsorn, Permament Secretary of Ministry of Transport (MOT) led MOT’s executives and head of organizations under to participate in the sign.