Literature Reference: 天资帝王宅，以我为关钥。—— 《华山歌》 Heaven endowed the imperial residence, with me as its key. Source from 'Huashan Ge'.
关: Care and concern, symbolizing family harmony and mutual support.
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 key symbolizes control and protection, embodying significance and responsibility.