Literature Reference: 药草诚多喻，沧溟在一毫。—— 《题藏公院》 Herbs indeed offer many metaphors, yet the vast ocean lies within a single brushstroke. Source from 'Ti Canggong Yuan'.
沧: It signifies a deep green hue (referring to water), and also carries connotations of chill and coldness. Use with caution.
毫: Hair's breadth, the slightest. Originally referring to long and sharp hairs, it later metaphorically denotes the tiniest of things or the most minuscule quantities or parts.
Meaning: Vast as the ocean yet delicate as a brushstroke, symbolizing depth and subtlety.