1, I mean people with shallow knowledge; Humble, call yourself to others. From Historical Records Biography of Zhang Shizhi and Feng Tang: "Tang Xie said' I don't know taboos'." "

2. Example: Cai Dongfan's Preface to the Romance of the Qing Dynasty: "I ask myself that I have no historical talent and dare not talk about historical events. However, I can't steal without worrying, but I think I have corrected it, and I am ashamed of myself; Those with drills will never be compiled. "