Literature Reference: 不寝听金钥，因风想玉珂。—— 《春宿左省》 Unable to sleep, I listen to the golden key, while the wind reminds me of jade pendants. Source from 'Spring Night at the Left Secretariat'.
金: Gold, the precious metal. Symbolizes the prosperity of wealth and abundance.
钥: The key, the lock and key. A metaphor for the pivotal element in accomplishing a task, also symbolizing a strategic military stronghold.
Meaning: The golden key symbolizes preciousness and authority, signifying the mastery of wisdom and pivotal knowledge.