1, the story of Yinshan Iron Wall:
In the Song Dynasty, it was mined here to smelt silver and iron and make weapons. When Su Dongpo visited, he wrote the word "Iron Wall" in calligraphy, which was engraved on the cliff by later generations and is still clearly visible today. There are both ancient silver mining and smelting sites and today's "the first furnace in the south of the Yangtze River".
2. Synonyms of Yinshan Iron Wall:
(1) Iron Wall: It means that the defense is very strong and indestructible, and it also means unity.
Origin: Chapter 48 of Shi Naian Ming's "Water Margin": When Song Jiang led his troops to the back of Dulonggang to see Zhujiazhuang, there was an iron wall behind him, which was well preserved.
(2) Tight barriers: It used to mean tight military security, but now it is also used to describe that the boundary between the two is very clear.
Source: Chen Qing Hongyou's Chronicle of the Whole Tang Dynasty: "The narrative and discussion in Zhou Xing Jiang Yun Ji are all based on the canon, which can be described as rigorous and radiant."
(3) impregnable: the original meaning is a city made of metal and a moat formed by boiling water, which is a metaphor for tight defense and impeccable.
Source: The Biography of Han Kuai Tong by Ban Gu in the Eastern Han Dynasty: "There must be a baby city in the land of border cities, all of which are Jincheng and Tang Chi, and they cannot be attacked." Based on this, later generations refined the idiom "as hard as gold".
Examples of Yinshan Iron Wall:
1. In history, there were about 8 soldiers in a row of each Spartan infantry phalanx. In the battle, the soldiers in the front row raised the big round shield to form the iron wall of Yinshan, and the soldiers in the middle and back rows inserted the spears in front, which had both offensive and defensive effects.
2. However, under the joint defense of the army and the people on the iron wall of Yinshan at that time, Dou Xiangsong was arrested by the militia as soon as he checked into the Haojiamiao Hotel of Workers, Peasants and Soldiers, and several Soviet-made incendiary bombs and high explosives were found in his backpack.
It doesn't matter even if the road ahead has an end. I met a group of fellow travelers, and we can go the same way, because we can all run to an iron wall of Yinshan without changing roads.
4. Clean up sundries, remove silt, open the manhole cover and dredge the pipeline. They have no neat formation and no loud slogans. They stand in front of the manhole cover of the sewer, seemingly lonely, but they are the iron wall of Yinshan Mountain.
It's just that the four sides of the hole are firmly framed by silver iron walls, even the windows are closed and covered with dark curtains.