Tieguo Jincheng
Tieguo Jincheng is an idiom, pronounced Ti ě Gu ō J ī NCH é ng, which refers to a fortified city. It comes from Feng Guifen's Gong Qi Zeng Xie Kui in Qing Dynasty.
source
In Feng Guifen's Gongqi Zeng Xie Kui of the Qing Dynasty, "once the army arrives, the rotten pearls and withered trees will also help the prestige; if the army does not arrive, the iron city will be reduced to ashes."
Examples
In Feng Guifen's Gongqi Zeng Xie Kui of the Qing Dynasty, "once the army arrives, the rotten pearls and withered trees will also help the prestige; if the army does not arrive, the iron city will be reduced to ashes."
usage
Used as a subject or object; used in figurative sentences
Tieguo Jincheng