 In June 1261 the Emperor opened an examination for scholars who wanted to be appointed as mandarins of the administrative system.The examination comprised two abilities of writing and calculating.In the royal court, Thánh Tông proved to be a skilled ruler with his often right appointment of officials such as his brother Prince Chiêu Minh Trần Quang Khải for the position of grand chancellor or Lê Phụ Trần and Prince Hưng Đạo Trần Quốc Tuấn for the position of military commander.