This is a word. Where did it come from?

The above word comes from Mr. Wang's evaluation of the four great calligraphers in the Qing Dynasty: "There were four great calligraphers in the Qing Dynasty, but each of them had a fault (shěng), which was covered with a (prince) board, tripped by Liu (Yong), tripped by Weng (Fang Gang) and was soft in iron (An). Embarrassed is putting on airs, arrogant is guilty; Hesitants want to retreat. "

The above calligraphy works were copied by an author named Sun Feng (a Qigong calligraphy enthusiast), but the words used are slightly different. Interpretation: It is said that there are four books in the Qing Dynasty, which are allowed to be said, but sages may have their own; Gaichengban, Liu Jian, Weng Yun, Tie Rou. The awkward person is right and arrogant; He who hesitates will retreat if he wants to advance. Sun Fengshu in early spring in Xinmao (201kloc-0/around March and April in early spring)