上了初中学习就下降孩纸
[shàng le chū zhōng xué xí jiù xià jiàng hái zhĭ]
This name conveys frustration or self-deprecation of a student who found their grades declining after entering junior high school. 'Kid' is a colloquial way to refer to oneself, implying the user might be young and feeling down due to academic challenges.