Literature Reference: 磴道盘且峻，巉岩凌穹苍。—— 《相和歌辞 北上行》 李白 The winding path is steep and rugged, with towering cliffs reaching the vast heavens. Source from 'Song of the Northward Journey' by Li Bai.
穹: The vaulted arch, akin to the majestic dome of the heavens.
苍: Indigo blue, deep green.
Meaning: The vast heavens symbolize boundless expanse, height, and infinite possibilities.