Literature Reference: Faithful Duke Liu, he settled on this vast plain. Source from 'The Book of Songs: Greater Odes, Shengmin Zhi Shi, Gong Liu'.
斯: This person, this moment. It conveys a sense of refinement, the awe-inspiring dignity of a sage, and the dedication of one who lives and breathes their principles morning and night.
原: Originally, the true meaning. It metaphorically signifies the ability to remain steadfast in one's heart and not waver.
Meaning: Si Yuan represents a vast plain, symbolizing expansiveness, inclusiveness, and prosperity.