The "three points" in "three points into the wood" is 1 centimeter.
1 feet=10 feet
1 feet=10 inches
1 inch=10 minutes
1 feet=3.33 meters
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1 foot = 3.33 decimeters
1 inch = 3.33 centimeters
1 minute = 3.33 millimeters
So three points equals 1 centimeter.
Wang Xizhi, a famous calligrapher in the Eastern Jin Dynasty, began to practice calligraphy when he was 7 years old. He practiced calligraphy very hard. He often practiced calligraphy by the pool, and the water in the pool was dyed black. When he was 33 years old, he wrote "Preface to the Lanting Collection" and when he was 37 years old, he wrote "Huang Ting Jing". Later, when the wooden board on which he was writing was replaced, the craftsman discovered that Wang Xizhi's writing was so powerful that his handwriting penetrated three-thirds of the way into the wooden board. Later, "three points into the wood" was used to describe the power of the calligraphy pen, and also to describe the profound and precise insights and discussions. Volume 87 of the language version of "Shuo Yong" quotes Zhang Huaiguan of the Tang Dynasty from "Shu Duan·Wang Xizhi": "Wang Xizhi's blessing edition was cut by a worker, and the pen penetrated into the wood for three thirds."
Source: Tang Dynasty·Zhang Huaiguan's "Shu Duan·Wang Xizhi" "Wang Xizhi": "When the Emperor of Jin Dynasty offered sacrifices to the northern suburbs, he changed the blessing board, and the workers cut it, and the pen penetrated three-thirds of the wood."
Interpretation: According to legend, Wang Xizhi was writing on the wooden board. When the carpenter was carving, he found that the writing penetrated three-thirds of the wooden board. (One third equals 1 centimeter) deep. The calligraphy is described as extremely powerful. The problem of multi-metaphor analysis is very profound.
Example: "Yang Xueshan returned from Changyuan and presented her recent works, admiring the lack of poems to express love" by Zhao Yi of the Qing Dynasty: "One third of the poem is deep into the wood, and the poem is sharp, and the five colors of the cloud are scattered and the material is new."
◎Lu Xun Not only did he "deeply" expose the poison of old "children's books" to children and contribute to "getting rid of the poisonous bait for children", but he also put forward many insightful insights into the creation of new children's books; at the same time, He himself collected children's songs and translated excellent foreign children's literature and science novels.
◎In order for Sun Kai to thrive in the business world, the scene in which his wife falsely claims that the boss invites him to dinner, dance, and sends flowers is quite penetrating to express the ambivalence faced by Sun Kai.