Interpretation: excellent, the metaphor is already very good, and it needs to be better. "The Analects of Confucius Learn" and "Poetry" say: If you cut it like a theory, if you cut it like a mill, "Song Zhuxi's collected works note:" Those who treat bones with words must cut it before talking; Those who deal with jade will grind it again; If it is handled well, it will be beneficial to seek its essence. " After that, strive for more accuracy and beauty with the explanation of "Excellence". In the Qing Dynasty, Zhao Yi's "Ou Bei Shi Hua" has seven characters: "Those who cover things artificially are probably more and more innovative, more and more refined, and more and more encrypted secrets, which is due to the wind. Mao Zedong commemorates Bethune: "Comrade Bethune was a doctor. He takes medical treatment as his profession and constantly improves his skills. "
Huai Su: (725-785) was born in the Tang Dynasty, with a hidden word. His monk name was Huai Su, and his common surname was Qian. Han nationality was born in Lingling, Yongzhou (Hunan). A good Buddha at an early age made a monk. He is the leader of a generation of coquettish cursive scripts in the history of calligraphy. His cursive script is called "Crazy Grass", which is round and powerful with a pen, making it like a circle, unrestrained and smooth, in one go. He is as famous as Zhang Xu, another cursive writer in the Tang Dynasty, and is called "Zhang Diankuang" or "Zhang Dian Zui".