I seemed to really hear that a group of familiar strangers were standing outside the door.They have been forgotten by the country they once loved so much. At this moment, they traveled through centuries of history, dressed in green shirts, expressionless, and were knocking on the door knocker. ——On August 8, 2008, the opening ceremony of the Beijing Olympic Games, amidst the fireworks, the "Preface" was revised I was employed by a great memory. —Swedish poet, Thomas Tranströmer