怀: Yearning and reminiscence, here signify family harmony and mutual care.
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.
Meaning: The name 'Huai Si' carries a gentle and elegant rhythm, with 'Huai' implying tolerance and remembrance, while 'Si' conveys refinement and grace, creating an overall impression of sophistication and depth.