Literature Reference: 虽投定远笔，未坐将军树。早知行路难，悔不理章句。—— 《相和歌辞 从军行》 王昌龄 Though I wielded the brush of determination, I never sat beneath the general's tree. Had I known the hardship of the journey, I would have regretted not mastering the classics. Source from 'Xianghe Geci: Congjun Xing' by Wang Changling.
章: Charter and Discipline.
句: Sentence. Syntax.
Meaning: Zhang Ju refers to the chapters and sentences of classical works, symbolizing erudition and mastery of literature.