Literature Reference: The character 'Yu' comes from 'The Book of Documents: Great Yu's Plan': 'Yu Yu Er Gong.' The character 'Xian' comes from 'The Book of Songs: Greater Odes of the Kingdom: King Wen': 'King Wen is on high, shining in heaven. Although Zhou is an old state, its mandate is renewed. Zhou is illustrious, and the Emperor's command is timely. King Wen ascends and descends, at the Emperor's left and right. Diligently, King Wen, his fame never ceases. He bestowed blessings on Zhou, and his descendants inherited the throne for a hundred generations.'