Literature Reference: 孝子不匮，永锡尔类。——《诗经·大雅·文王》 Filial sons are never lacking; may you forever be blessed with such virtue. Source from 'The Book of Songs: Da Ya: King Wen'.
孝: Filial piety and integrity refer to being a dutiful child and maintaining incorruptibility.
先: Formerly. Previously. Originally. Pioneer. What comes before in time or sequence, in contrast to "later."
Meaning: Filial piety comes first, emphasizing the virtue of respect and care for elders.