How did ancients install 40 tons of iron chains in one year on Dadu River 300 years ago?

You must be familiar with Luding Bridge. This bridge is known for fact that a river rages under bridge. The classic hero of bridge story, Feiduo Luding, refers to this bridge. To everyone's surprise, this Bridge of Heroes is over 300 years old.

From ancient times to present day, this bridge stands on Jinsha River, testifying to years of generations of people.

1. The history of Red Army heroes on bridge

It can be said that this bridge has experienced many ups and downs and witnessed one heartbreaking heroic story after another. In 1935, Chinese Red Army was forced to move in what we often refer to as "Long March". On way of Long March, we passed this endlessly flowing and fast-flowing river.

Behind him was an enemy attack, and in front of him was a river. In desperation, a large army was forced to start crossing Dadu River. The bridge that is used when crossing river is Luding Bridge, which is connected to river. Before crossing bridge, soldiers were surprised to find that wooden planks covering bridge had been removed at some point. Three iron chains.

Under iron chain, river flows extremely fast. If you accidentally fall into river, you will definitely be carried away by river. Large parties could not cross bridge, so they had to carry their guns and bags one by one, crawling forward on bare iron chains, hands and feet clasped together. On other side of bridge, enemy continued to fire. People withstood a hail of bullets, held cold iron chains in their hands, and beneath them river raged.

Some of soldiers were shot and lost their strength in their arms, so they could only allow themselves to be transported into river and be washed away by river. Despite fact that it was so difficult, our large troops still safely switched sides and won this hard-won victory. Thus, this bridge has become a hero bridge in people's hearts to witness history.

2. Current state of bridge

Now this long bridge has become a tourist attraction and many tourists come to see and check in. There are even many amusement structures that imitate appearance of this bridge by linking two ends with iron chains, making bridge unstable.

People walking on bridge, bridge will continue to shake from frequency of people walking and mountain wind blowing, people will find it new and interesting, of course, some timid tourists will also find it very exciting. There is a fee to visit this bridge.

It is understood that ticket rule for this Heroes Bridge is that locals do not charge, but tourists who come to travel must charge a ticket fee of 10 yuan.

This also caused dissatisfaction among many tourists. Many tourists pointed out that we are one family, so why don't they charge locals, but charge foreigners? It's too "different from one".

3. Bridge Structure

As we know above, this bridge was built by ancient people three hundred years ago. The ancients did not have lifting tools, and it was almost impossible to build such a long iron bridge on both sides of such a fast river. How was this bridge built?

According to local residents, this bridge was built bit by bit using a special device - a "zipline". How is zipline element used? It turns out that in area where river is located, there has long been a way to cross both ends of river, sitting on ropes.

Masters have learned this method and applied it successfully. They tied ropes on both sides of river and inserted bamboo tubes into ropes. ropes. In this way, rope can control bamboo tube to convey iron chain rope used to build bridge to other end of river.

Not only zipline technology, but also iron chains used for handrails of this bridge are hard-earned items by locals. Even more than 300 years ago, iron smelting technology was not as developed as it is today, and technology for manufacturing iron parts was not as convenient as it is today. The total number of iron parts needed to repair bridge should be about 40 tons.

Locals cannot produce such a huge amount of iron parts. Iron ore resources in this area are scarce, and there are no dense blacksmith shops in area to make required parts and iron chains.

Artisans had to cross mountains and rivers to smelt iron ore in an area rich in iron ore more than 100 kilometers away, and then transport smelted iron ore back to river. To ensure quality and safety of bridge, manufactured iron rings are made bit by bit by specially designated personnel supervising craftsmen, and there will never be slightest mistake.

Conclusion: Luding Bridge is a heroic ancient bridge and a red bridge of those times with strong historical traces. He witnessed ups and downs in long river of time, and also witnessed advanced spirit of generation after generation of heroes and people who are not afraid of hands and feet, dare to devote themselves and sacrifice themselves. At same time, it also integrates fine customs and advanced production and smelting methods, as well as wisdom of ancient people, and is our precious spiritual and intellectual heritage.