But he did not know what exactly had happened until he read the feathered letter the next day, which was carried to him by a post rider through a non-stop delivery. The emperor prepared to withdraw from the capital and set a banquet on the tower. Noticing that the people sitting around were all miserable, he asked singers to perform a piece of lyric. How could fortune and prosperity last forever? The Emperor said: “What a genius.” Soon he left the banquet without taking a drop of wine. The song is not only a eulogy dedicated to a falling empire, but also a testament to a piece of history that the fire and smoke signal network was engaged and penetrated. And when later generations stand on top of a beacon tower, they are overwhelmed by the same reflection or a sense of melancholy. The moon rising above Western Garden remains the same.