Literature Reference: 永昌，长久昌盛之意，出自《诗经·大雅·文王》：‘文王在上，于昭于天。周虽旧邦，其命维新。有命自天，命此文王，于周于京，缵女维莘。长子维行，笃生武王。保右命尔，燮伐大商。’ Everlasting prosperity, derived from 'The Book of Songs·Da Ya·King Wen': 'King Wen is above, shining in the heavens. Although Zhou is an ancient state, its destiny is renewed. The mandate comes from heaven, appointing King Wen, in Zhou, in the capital, continuing the lineage of the virtuous. The eldest son carries on, destined to give birth to King Wu. Protect and assist, appointed by heaven, to conquer the great Shang.'