Literature Reference: 孀娥理故丝，孤哭抽余思。—— 孟郊《秋怀 三》 The widow sorts through old threads, her lonely cries draw out lingering thoughts. Source from 'Autumn Reflections III' by Meng Jiao.
余: Surplus, a metaphor for a life of abundance and prosperity.
思: Thought, intellect. In names, it often signifies quick thinking, sharp wit, and intelligence.
Meaning: Yu Si signifies profound reflection and nostalgia, embodying a remembrance of the past and contemplation of the future.