Tongguan, Fengling crossing.

Although the fire rafts floating down from the upstream are not dense, they continue to interfere with the progress of the construction of the wooden bridge.

These rafts are released from the east bank upstream, and are often gathered together by whirlpools in the gentle water of Fenglingdu, or sunk, or rushed along the current to the south bank.

Twenty or thirty steps upstream of the wooden bridge construction site, there are two pontoon bridges extending from the south bank to the north, which serve as a shelter from the harassing fire rafts.

At the same time, the government soldiers and boats came and went, collecting and towing the extinguished Wei army rafts.

The speed of the wooden bridge construction exceeded many people's expectations, and the full pet passing through Tongguan was also surprised.

He stopped at the north and saw the boat in the middle of the river dragging and anchoring repeatedly, in order to nail a huge log into the middle of the river.

It is a carefully machined wooden stake with a base about five feet in diameter, polished into a cone, and hung with weighted stone.

The stone is polished into a tile shape and wrapped in the middle and lower sections of the stake to facilitate the stake to sink and touch the riverbed.

The Wei army on the north bank only dared to set fire rafts to harass them, and there was no other action during the day.

Looking at the Weihe estuary and Jinghe estuary further upstream, where the Beifu water village is connected, it seems to be counteracting.

As long as the Wei army on the opposite bank sailed down the river to the south, they would kill it from the upper reaches.

So at present, at this bend of the Yellow River, the Wei army and the government soldiers have seized the upper reaches...... Whoever strikes first will be downstream and suffer a disadvantage.

Therefore, the real fierce battle will be when the wooden bridge is about to be connected.

At this moment, he looked at the water villages on both sides of the strait, and then carefully observed the water flow and whirlpool, and always felt that Zhao Yan, the general of Hedong, would come ruthlessly.

Normal means of defense are not able to destroy the progress of the wooden bridge.

If...... In the blink of an eye, he thought of an effective means of destruction, but he still looked thoughtful.

The Beifu military official who escorted him into the customs next to him asked: "Gong Nai is a famous general in the world, if he lives in the east of the river, can he crack both sides?" ”

"There is no good solution in the eagerness."

Man Zhong raised his horsewhip and pointed at the river: "The Yellow River occasionally freezes in winter, but it will affect the work?" ”

"Freezing?"

When the officer heard this, he just smiled: "How can this be in the way? If you can have a thick ice, you can save a lot of trivial things. ”、

Full of favor is also suddenly, follow the military officials to the rail car station, from here you can take the car to Changlepo.

In the car, full of pets more focused on observing the Fubing Water Village at the mouth of the Weishui River, thinking about other ways to solve it.

There are often unstable floods in Weishui and Jingshui in the upper reaches of Fenglingdu, as well as the unstable freezing period of the Yellow River, so the water flow in the Fenglingdu area is gentle...... It is also not suitable to build pontoon bridges.

With current technology and manpower, it is only possible to erect wooden piles in the river as a bridge foundation.

We will never expect any stone bridges, bridges, or wooden bridges that are not broken for a hundred years, and they can reach the standard in ten or twenty years.

Just build the first bridge, and then step on the first bridge to build the second bridge...... It can simplify a lot of processes and manpower.

The two parallel bridges are not only conducive to traffic, but also conducive to future repairs.

Building bridges and bridges in the Fenglingdu area to clear the customs and the east of the river is by no means the idea of the Beifu family.

Previously, Wei had a similar idea, repairing bridges can facilitate the rapid flow of materials and personnel, accelerate the efficiency of military transportation, and save costs.

When Man Pet came to Changlepo, he happened to see the laborers who built the first neighborhood carrying stones from the Kunming Canal ship.

As autumn progresses, the eight water systems around Chang'an are growing stronger, speeding up the efficiency of material transportation.

Tian Xin led people to inspect the repaired sewage canals in various places...... Although it is not a loess plateau, it is also a loess plateau, and the mouth is seeping water...... It should erode the soil to form underground cavities, and attention should be paid to construction to avoid their formation.

The sewage channel directs sewage and feces to concentrate in the low-lying area in the northeast corner.

will concentrate on composting...... Perhaps there is also a continuous supply of energy to produce soil nitrate, and after simple purification, coupled with the sulfur of the South Seas, it may be able to enter the era of queuing and shooting in advance.

Contrary to the expectations of Man Chong, Cao Pi and others, it seemed that Tian Xin had more important things to do, and he did not arrange to meet Man Chong that day.

At night, Tian Xin was observing an epoch-making thing.

This is a very primitive boiler, the boiler burns with steam, plus cylinders, pistons, gears, push-pull rods...... This kind of rough but powerful steam piston movement made Tian Xin feel sincerely cordial.

Even if you are not a science student, you still feel that gears and cylinders are very kind.

Ma Jun was also very apprehensive when he stood on one side, over the years, it was Tian Xin and Maicheng craftsmen who initially improved the spinning cars and looms for weaving; After the new loom arrived in Guanzhong, Ma Jun, under the leadership of Wu Zhen, improved the Maicheng loom for political purposes...... This is a larger, more sophisticated loom.

Wu Zhen did not have the strength or time to promote this large loom, which was improved by Ma Jun and Beifu craftsmen and became the latest loom.

The shortcomings of this loom are obvious, it is not suitable for family manpower at all, and it is not driven by hand crank and foot pedal.

Cattle and horses and donkeys are not good enough to be stable and durable.

This new, large-scale loom is built on hydraulic power...... This is also the trend of improvement and development of looms in the future, which will become larger and more complex and will be decoupled from the existing family looms of the people.

In the future, the improvement and production of looms will never serve families and estates.

Now, as the explosive force of the boiler steam is converted into fixed mechanical energy...... Another restriction on large looms was lifted.

In the future, textile workshops will no longer have to rely heavily on canal power...... After all, you can use canals to drain water and use water power; That torrent can also run down the canal and destroy your workshop!

Steam kinetic energy looms, stamping coins, casting, hammer forging ...... Transfer the boiler to the boat for rowing, transfer it to the rail car, and use the gears to push the wheels to run.

There is no need for Tian Xin to carefully dial it, in front of the magnificent power of steam, not only Ma Jun, but also other craftsmen have also thought of various scenarios that can be applied.

You can even let the rail car get off the wooden rails, walk on the flat ground, and attack the enemy formation!

If the car can move, it doesn't even need to be impacted, just relying on the high-temperature steam washing, it can kill countless enemies!

Times have finally changed.

Tian Xin's feelings are difficult to describe, and the most regretful thing at this moment is ...... The most suitable for the birth and outbreak of steam engines should be in the Wuchang area.

Here, you can use the convenient water transportation of the Yangtze River to absorb upstream and downstream materials; It is then dumped into the Yangtze River basin at a lower cost......

But this is Guanzhong, and it is necessary to maintain technological superiority to exploit and absorb the blood of the surrounding area.

Only in this way can the craftsmen, officials, and people be stimulated from the bottom up to actively produce, actively improve, and compete with each other.

You don't need to do it yourself, just guide and control the collective to grow.

Perhaps there are more advanced management theories that can lead the technological revolution for the benefit of the people...... But if you don't understand it, it's better to engage in primitive and bloody ones, so that you can control and understand them.

What is well controlled is stable.

Even now, what blast furnace, is it that kind of very high smelting furnace?

The understanding of machinery is so shallow, and the cognition of the technological revolution stays on the sheep eating people and Jenny machines.