strong
It's a Chinese idiom. Pinyin is t ó NGD ǎ Ti ě zh ù. It's very reliable and stable. It can also refer to a person's perseverance. It comes from the warning of the world in Ming Dynasty.
Idioms and allusions
Feng Menglong of the Ming Dynasty's the general statement of the police: "more than that, there are many differences in being an official. A local official is a man of iron and bronze. If he withdraws from the office, he dares to say his words."
usage
As an attribute; used in figurative sentences
Chinese PinYin : tóng dǎ tiě zhù
strong
Carp leaping to the dragon's gate. lǐ yú tiào lóng mén
things done cannot be undone. pō shuǐ nán shōu
Anger comes from the heart, and evil comes from the gall. nù cóng xīn tóu qǐ,è xiàng dǎn biān shēng