Mr. Rithika Suparat, Deputy Governor (Administration) on behalf of Mass Rapid Transit Authority of Thailand (MRTA) signed the book of blessing for Princess Maha Chakri Sirindhorn in occasion of HRH’s birthday on Friday 2nd April 2021 at the Grand Palace where Mr. Weerasak Wangsuphakijkosol, Deputy Minister of Transport led head of the organizations under Ministry of Transport to participate in the sign.