Iron heart and iron gall
Tongxintiedan, a Chinese idiom, Pinyin is t ó NGX ī NTI ě D ǎ n, which describes a person's firm will. From Xiao Shulan.
Idiom explanation
To describe a firm will.
Idioms and allusions
The second fold of Jia Zhongming's Xiao Shulan in Ming Dynasty: "every scholar's eyes have been greedy since ancient times. It's not like he has such a strong heart here."
Discrimination of words
As an object or attribute; used in figurative sentences
Chinese PinYin : tóng xīn tiě dǎn
Iron heart and iron gall
draw the bow both on the left and right. zuǒ yòu kāi gōng
but it is all overgrown with rank grass. jū wéi mào cǎo
the dog of jie barked at yao-utterly unscrupulous in its zeal to serve its master. jié quǎn fèi yáo
Late Chu Dynasty and early Qin Dynasty. mù chǔ cháo qín