In the fifth year of Tianhe, when Lu Teng, a general of the Northern Zhou Dynasty, built Anshu City in Xiling Gorge, he used thick ropes to pull the other side of the river, weaving reeds and grass to form a cable bridge to facilitate the transportation of rations. Unfortunately, Zhang Zhaoda, a famous Chen Dynasty soldier, tied a long knife to the ship under construction, with the blade facing upwards, and sank the ship into the river. When the boat passed under the bridge, it naturally cut the rope and the bridge ceased to exist.

The mouth of Qutang Gorge in the Three Gorges is easy to defend because it is dangerous. It is not uncommon to set up pontoons and iron chains to block rivers here in the past dynasties to resist foreign enemies, but for a long time, only a few remains remain of these bridges.

2. Yunyang Yunan Oblique Zhang Qiao

Yun 'an Town, Yunyang County, as an important salt town in the Three Gorges, is divided into north and south banks by Tangxi River, so it is very inconvenient for residents to cross the water.

1972, the construction of single-chain flexible pedestrian suspension bridge was started here, but the "inclined Zhang Qiao" was rebuilt due to insufficient materials. In order to save costs and materials, this change made Yun 'an XieZhang Qiao the first cable-stayed bridge in China, and won the National Science Conference Award and the Science and Technology Achievement Award of the Ministry of Communications, which laid an important foundation for the name of "Bridge Capital" in Chongqing.

3. Drifting from the Three Gorges

In ancient times, the ancestors of Chuanjiang had nowhere to hide when they encountered floods. They were born when they accidentally caught a tree in the water, and then several "branches" were tied together. This is the earliest raft in history. The ancestors used water power to float the raft down the river to reach their destination, which is called releasing the raft.

There is a large area of virgin forest in Chuanjiang River basin, which provides raw materials for building rafts. The mountain people who have lived here for generations make a living by rafting. Every year in the peach blossom season in March and April of the lunar calendar, the raft is artificially drifted to the intersection of tributaries and the main channel of Chuanjiang River. However, due to the dense reefs, rafts often fall apart and are lost, threatening the safety of workers and ships sailing on the river.

1957 Chongqing Branch of Yangtze River Waterway Administration negotiated with Sichuan Provincial Bureau of Forest Industry to try to haul rafts by freighter. On July 10, the small tugboat "Shengjian" tried to tow a raft with a length of 84 meters and a width of 16 meters from Yibin with a power of 400 HP, and it took three days to reach Chongqing safely, creating a precedent for Chuanjiang steamers to tow rafts.

June 5438+February of that year, Shengjian extended the route to Yichang, and successfully hauled the raft across the Three Gorges natural barrier. In the end, the route reached Shanghai as far as possible, and the ship towing gradually replaced the original artificial discharge in Chuanjiang. Beginning in the early 1990s, Mupi gradually withdrew from Chuanjiang and remained in the shipping history of Chuanjiang forever.

4. Knock out the Yangtze River Channel

Since the twenty-first year of Jiajing in the Ming Dynasty, there have been many rockfalls in the Green Beach of the Three Gorges, which has been open to navigation for 82 years. In the fourth year of tomorrow, Qiao Gongbi, the provincial judge of Huguang, led Yang Qizhen, who is in Qianzhou, to carry out a large-scale renovation of Qingtan. These two adults still use the method of burning stones by their predecessors, but this time they burn coal instead of firewood, which is small in size, large in firepower, long in burning time and generates more heat.

The predecessors burned firewood on the rocks, but these two adults went one step further, digging holes in the rocks and burning coal in the holes to concentrate heat. After reaching a certain temperature, the reef is watered with vinegar, which immediately expands and cracks a layer, and then calcined layer by layer until it becomes a block that can be drilled with hammer steel.

If you don't look at today's serious business, you may never think that today's unobstructed Yangtze River waterway is actually hammered out by such an action, condensing the sweat and even blood of the ancients.

5. Three Gorges Cave promotes human art..

In ancient times, there were countless caves in the Three Gorges, which were warm in winter and cool in summer and had water sources. They used to be where their ancestors lived.

One day, an ancestor was idle, took a small piece of stalactite from the cave and polished it ... About1.40 thousand years later, a descendant named Huang Wanbo found this stalactite he called "Stone Whistle" in Fengjie Gun Cave, and played it in the opposite direction, which could emit clear and stable audio from one side of the gap. It may be the earliest musical instrument of mankind.

Later, a stalactite shaped like an owl was discovered. Archaeologists call it "the stone owl", which is probably the oldest stone carving.

Then, Huang Wanbo dug up two tooth fossils of the stegosaurus in the cave, one was 1.89 meters long and the other was 2.08 meters long. The ancestors who owned these two ivory carved several straight and deep curves on them with stone tools. The lines are rough and powerful, forming simple tridents, crosses, feather crowns, etc., and the graphics are abstract.

Although the specific meaning is unknown, it is considered to be the earliest sculpture art in the world, which has pushed forward the previously known embryonic period of human art for 60 thousand years.