This idiom describes writing or analysis that is profound and penetrating.
Dōng Jìn shūfǎjiā Wáng Xīzhī shì shūshèng
东晋Dōng Jìn🔊书法家shūfǎjiā🔊王羲之Wáng Xīzhī🔊是shì🔊书圣shūshèng🔊。
Tā měitiān kèkǔ liànxí shūfǎ
他tā🔊每天měitiān🔊刻苦kèkǔ🔊练习liànxí🔊书法shūfǎ🔊。
Yǒu yí cì tā zài mùbǎn shàng xiězì
有一次Yǒu yí cì🔊，他tā🔊在zài🔊木板上mùbǎn shàng🔊写字xiězì🔊。
Gōngrén hòulái xiāo mùbǎn shí fāxiàn mòjì yǐjīng shènrù mùtóu sān fēn shēn
工人Gōngrén🔊后来hòulái🔊削木板xiāo mùbǎn🔊时shí🔊发现fāxiàn🔊，墨迹mòjì🔊已经yǐjīng🔊渗入shènrù🔊木头mùtóu🔊三分深sān fēn shēn🔊。
Kějiàn tā de bǐlì duōme shēnhòu
可见Kějiàn🔊他的tā de🔊笔力bǐlì🔊多么duōme🔊深厚shēnhòu🔊。
English Translation:
The Eastern Jin calligrapher Wang Xizhi was the sage of calligraphy. He practiced calligraphy diligently every day. Once, he wrote characters on a wooden board. When workers later planed the board, they found the ink had penetrated three tenths of an inch into the wood. This shows how powerful his brushwork was.