Literature Reference: The virtue of Jizi of Yanling is constant and enduring. Source from 'Zuo Zhuan'.
延: "To extend, to introduce, and to facilitate the attainment of grand achievements, this character is auspicious for garnering fame, fortune, and good luck."
恒: Eternity, unwavering perseverance.
Meaning: Extending and enduring, symbolizing eternal perseverance and profound virtue.