骑着竹马尝着青梅

A culturally significant reference from Chinese poetry and literature, this idiom originally meant two children, typically a boy and a girl, growing up together. The bamboo horse ('竹马') symbolizes boyhood games, while tasting the '青梅' (green plums) represents young romantic sentiments between two youths growing up together, implying innocence and purity. It often refers to first loves or childhood sweethearts who grow up side by side, but this particular netizen’s name highlights the innocence and playfulness of youth, evoking memories of carefree and pure days filled with simple joys such as these childhood activities.