iron walls and brass partitions
Tiebi Tongshan, a Chinese idiom, Pinyin is ti ě B ì t ó ngsh ā n, which means a strong and reliable force. From "knight errant biography · knight errant circle".
The origin of Idioms
Qing Ganxing's "knight errant biography · knight errant circle" said: "these two big heads are my iron walls and Tongshan. Don't these little officials let me do it freely?"
Idiom usage
It is often used in figurative sentences.
Chinese PinYin : tiě bì tóng shān
iron walls and brass partitions
there is nothing one does not understand. wú suǒ bù tōng
when the clouds part , one sees the sun. yún kāi wù shì
Cast in bronze and cast in iron. tóng zhù tiě jiāo
Cut the thorns and cover the thorns. zhǎn jīng pī jí