Literature Reference: 瞿塘峡口冷烟低，白帝城头月向西。—— 《杂曲歌辞 竹枝 一》 白居易 At the mouth of Qutang Gorge, cold mists hang low; above White Emperor City, the moon shifts westward. Source from 'Miscellaneous Songs: Bamboo Branch, Part One' by Bai Juyi.
瞿: Ancient halberd-like weaponry.
烟: Smoke, billowing clouds. Herbal essence.
Meaning: Qu Yan depicts the cold mists at Qutang Gorge, symbolizing depth and tranquility.