Literature Reference: 梓，木也，恒，常也。—— 《说文解字》 'Zi' refers to wood, 'Heng' means constancy or permanence. Source from 'Shuowen Jiezi'.
梓: The tree name, known as the Catalpa.
恒: Eternity, unwavering perseverance.
Meaning: 'Zi' symbolizes vitality and growth, while 'Heng' represents perseverance and steadfastness.