In October 1925, when the President was 15 years old, his father sent him to Moscow, where he studied at the Sun Yat-sen University.
蔣公因為經國先生十五歲即出國，害怕他對中國固有的道德哲學和建國精神，未能有深切的領悟，所以在他回國後特別指示他用心研讀國父遺教，並要他廣泛閱讀經、史、子、集，蔣公曾這樣訓示：「你以後看書，應多注重中國固有道德、建國精神與其哲學。