Literature Reference: 蜀道之难，难于上青天。—— 李白《蜀道难》 The road to Shu is harder than climbing to the blue sky. Source from Li Bai's 'Shu Dao Nan'.
蜀: One of the feudal states during the Zhou Dynasty, located in the area of present-day Chengdu, Sichuan Province.
Meaning: Shu refers to the ancient Sichuan region, symbolizing ruggedness, magnificence, and resilience.