Literature Reference: 泉岩雪飘洒，苔壁锦漫糊。—— 《和微之春日投简阳明洞天五十韵》 Snow drifts over the spring rocks, and moss-covered walls are adorned like brocade. Source from 'He Wei Zhi Chun Ri Tou Jian Yang Ming Dong Tian Wu Shi Yun'.
苔: A type of cryptogamic plant, where the distinctions between roots, stems, and leaves are not clearly defined.
壁: Walls, barriers.
Meaning: Moss-covered walls signify the traces of nature and time, symbolizing simplicity and tranquility.