This idiom was originally used to describe the power of calligraphy, but now it is used to describe profound opinions on articles. From Zhang Huaiguan's Book End Wang Xizhi. Synonyms of penetration point are: penetrating the back of paper, iron drawing silver hook, etc. The antonyms are: a glimpse of the rainbow, a glimpse of the leopard in the tube, etc. "
The allusion of "straight to the point"
East Jin Mingdi once went to Gai Zhoushan, the northern suburb of Kyoto Jiankang, to worship the land god, and asked Wang Xizhi to write the memorial on a wooden prayer board, and then sent someone to carve it. The sculptor peeled off the board layer by layer, and found that Wang Xizhi's ink actually penetrated into the depths of the board, and it took three minutes to see the white background. The Taoist priest in Guanli admired his calligraphy for a long time and asked him to write a copy of Huang Tingjing in exchange.
Wang Xizhi liked those geese very much and agreed. So Wang Xizhi wrote a poem "Huang Ting Jing" for Guan Li, and the Taoist gave him all those geese. On another occasion, the emperor went to the northern suburbs to offer sacrifices, and asked Wang Xizhi to write his congratulatory message on a board, and then sent workers to carve it. The sculptor was very surprised when he carved. Wang Xizhi's calligraphy and brushwork actually penetrated into the wood for more than three points.
He praised: "The words of the general of the right army are really incisive!"