grind sword for a decade
As a Chinese idiom, the Pinyin is sh í Ni á nm ó Ji à n, which means to describe years of hard training. From swordsman.
The origin of Idioms
In the poem "swordsman" written by Jia Dao of Tang Dynasty, "a sword has been sharpened for ten years, but the frost blade hasn't been tried. Today, the sword is shown to the emperor. Who has any injustice?"
Idiom usage
It's formal, predicate and commendatory. example ten years of sharpening the sword, Wuling knot guests, the tears of life are gone. A collection of self inscriptions by Zhu YIZUN in Qing Dynasty
grind sword for a decade
wait every day under the tree , in the hope that a hare would kill itself by crashing into a tree trunk - shǒu zhū dài tù
Learning from the beginning and learning from the end - chì shǐ bì zhōng