Literature Reference: 维桑与梓，必恭敬止。—— 《诗经·小雅·小弁》 Mulberry and catalpa trees, one must treat them with reverence. Source from 'The Book of Songs'.
梓: The tree name, known as the Catalpa.
Meaning: The catalpa tree symbolizes one's homeland and roots, representing gratitude and remembrance of one's origins.