Ph?i h?p v?i các c? quan ch?c n?ng t??ch?c ti?p công dân theo quy ??nh. Ch??trì, ph?i h?p v?i v?n phòng t?nh ?y giúp th??ng tr?c t?nh ?y t??ch?c ti?p công dân.The Tr?n dynasty also adopted a singular approach to train new emperors: every time a crown prince attained the age of 18, his predecessor would abdicate and switch the throne over to