iron bastions

iron bastions

Tongcheng Tiebi, a Chinese idiom, is pronounced t ó ngch é ngTi ě B ì. It originally means that the defense is very strong and indestructible. It's also a metaphor for unity. It is the same as "iron wall". It's from the strategy of frontier defense in three provinces.

The origin of Idioms

According to Yan Ruyi's strategy of border defense in three provinces in Qing Dynasty, "those who make fortresses among the people are also ordered to follow suit, and they are located in the iron wall of the Tongcheng."

Word usage

Be subject or object