Literature Reference: 衍庆恒长，福泽绵延。—— 《诗经·大雅·文王》 May blessings extend and prosperity last forever. Source from 'The Book of Songs·Da Ya·King Wen'.
衍: Extend, initiate, evolve.
恒: Eternity, unwavering perseverance.
Meaning: Blessings extend and prosperity remains constant, symbolizing enduring happiness and stability.