Literature Reference: 钦惟大帝，[载]仰皇穹。始命田烛，爰启郊宫。云门骇听，雷鼓鸣空。神其介祀，景祚斯融。—— 《郊庙歌辞 祀圜丘乐章 雍和》 作者：褚亮 Revering the great emperor, we look up to the vast heavens. The first command lights the fields, and the suburban palace is opened. The sound of Yunmen startles the ears, and the thunder drums echo in the sky. The gods are worshipped, and the glorious fortune is thus harmonized. Source from 'Suburban Temple Songs: Sacrifice to the Circular Mound, Yonghe' by Chu Liang.