A phrase suddenly echoed in her mind: *Neither Auntie Gu nor Big Sister Gu know how to knit…* Suppressing the doubt stirring within her, Lin Qingping began to wash the sweater, kneading the wool inside and out. But as she turned it inside out, her fingers brushed against a detail that was incredibly easy to miss. A tiny patch of black fabric had been sewn onto the bottom left hem, bearing a single