Pinyin: rù mù sān fēn

Interpretation: According to legend, Wang Xizhi wrote on the board, and when the carpenter carved it, he found that the handwriting penetrated into the board for three minutes. Describe that calligraphy is very powerful. Nowadays, the problem of metaphor analysis is very profound.

Source: Zhang Tang Huai Guan's "Broken Book of Wang Xizhi": "Wang Xizhi's book is a blessing version, and it is cut by workers."