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.
勇:
Brave, fierce. Often used in male names, embodying the qualities of responsibility, courage, and a commanding masculine presence.
Meaning: The name 'Si Yong' carries a strong and concise rhythm, symbolizing unwavering determination and bravery.