At present, there is no large ship traffic in the upper reaches of the Yellow River.

Small boats come and go, stop when they reach a special place, and carry goods when they should carry them.

It's really impassable, otherwise it's desperate.

Generally, fishermen fish on the Yellow River without touching the pontoon bridge.

The upper reaches of the Yellow River, when it reached the 'several' field, were remote areas, and the capital protectorate and army were stationed.

To go up from the Yellow River, you need a slender man.

The Yellow River has not been fully utilized, otherwise from the Yellow River, the waterways are connected, and you can run to Minshan in one breath.

The land route of a certain distance is water and water, and it goes to Yizhou.

That is, the shipbuilding technology of the Turks and Tibetans is not good, otherwise people can find a river and directly hit Chang'an.

From that side to Chang'an, it belongs to the river, and the Yellow River has a great advantage when it is well used.

Datang has no steamers in the past, and will not choose the Yellow River to go up, go around a circle, the distance is long, and transport things by land.

Now there are steamers, and when the two sides of the pontoon bridge are connected, they form an obstacle to the transportation of the Yellow River.

Li Longji found a map and took a look: "The population over there is small, and the transportation of materials has to be a few big words." ”

"Third brother, trade, the Yellow River has passed, it's easy to come back, cantaloupe, raisins, livestock. There is no need for a slender man, and the consumption on the road is people to eat and drink, and there are no cattle and horses to eat and drink. ”

Li Yi scratched the map with his hand.

"Spout." Li Longji pointed his finger at the most critical position.

"Our ship is not big, a steamer, one is to open a canal next to it, and the other is to hang a rail, and sail on dry land."

Li Yi knew about Hukou Waterfall, where there was no way to sail.

In the past, people used to use dry land boats to solve the problem, and when the ship arrived there, it carried the supplies on the ship ashore, and the boat also carried ashore and used rolling logs to walk.

When you get to the other side, drop the water so that you can pass.

However, you can build a ditch, build a ditch two meters deep and ten meters wide, go around, and the small ship will pass.

If you have to sail on dry land, you add rails, rails, and boats to get stuck in place, and people drag them up.

Livestock can also help, and the problem of Hukou Waterfall is solved.

It's not that he was at that time, he needed to take a big ship, and he was always trying to find a way to build, with a large tonnage.

Li Yi felt that it was okay to weigh five tons as a whole, and as long as the quantity of three tons was enough, it would be no problem.

"Third brother, you see, from the Yellow River to that side, Tubo wants to fight us, take the Han River into the Yangtze River, it takes a distance by land.

Walking the Yellow River, it really can't be done, let's set up a point above the mouth of the pot, or take a section of land, transport by rails, and load and unload at the place. ”

Li Yi made a few more strokes on the map, and the most important thing was that several pontoon bridges were affected.

Li Longji looked at it carefully, and when it came to the major matter of transportation, he had to be cautious.

"Can the pontoon be separated?" Li Longji has an active mind.

"Yes, the pontoon bridge has always been built in a place where the current is not very turbulent, and the boat passes, disassemble a section, and then throw the rope to the opposite side, and then connect it."

Li Yi said that the pontoon bridge he used to have at that time could still be untied, and the iron cable was hanging.

It needs to be navigated, taken off, and connected early in the morning during the day after the boat has passed in the evening.

It is convenient to have someone in charge of reassembling the bridge with a rope against the impact of the river.

"It takes a lot of money." Li Longji talked about economic accounts again.

"Fees, pay fees for ships, and the money for construction will be paid back little by little."

Li Yi has a way, this is not a question of whether he invests or not, he must follow the rules.

Now people on both sides of the pontoon bridge are free of charge, and in the later part of history, it is also Li Longji's era, and the money is also confiscated when the iron cable pontoon bridge is used.

How do people collect money when they cross the river? People don't have money.

Bring a basket of eggs to sell, and take away a few eggs?

The pontoon bridge can't collect money, but the money for the boat.

Isn't it normal to load a boatload of eggs to sell and take dozens of eggs as a fee?

Li Longji's eyes lit up: "How much is appropriate?" ”

"Let's build it first, at least my Zhuangzi is going to form a fleet, the court doesn't invest, I invest, my Zhangjia fleet doesn't pay money, and I collect money for the rest."

Li Yi doesn't know how much money should be charged, there is no artificial canal, it is too early to talk about this, it depends on whether the transportation capacity is good or not.

Li Longji was tempted: "Brother Yi, you design a simple diagram, send it to my brother, find someone to study, and then analyze how to operate." ”

"My design is a full set of drawings, how simple is not simple, if you want to go around Hukou Waterfall, the waterway must be bent, otherwise the drop is too big.

Later, when we are in the dry season and when there is little water, we will smash the piers down, and the height from the water surface will be increased, and normal medium-sized ships will be able to pass through.

Then the sail should be equipped with sails, and when the wind is good, it will assist the ship to accelerate. ”

Li Yi didn't dare to think about a ship of several hundred tons at a time, a medium-sized steamer, and the whole whole added up to a full load of fifteen tons, including its own weight.

Just have a canal, don't underestimate the capacity of medium-sized ships, there are so many of them that everything will be different.

Forget about the goose boat, it's not enough to go up and rush the water.

Li Longji continued to look at the map: "Brother Yi has a location where the water flow is still too fast, can it run in sections, and the upper track is responsible for carrying it at the dock, and the ship can't go over?" ”

Li Yi glanced at his third brother in surprise, okay, it's amazing, he knows sectional shipping.

Yes, that's right, I used to be segmented there, why were the ancients always so smart? It's starting to be hard to pretend to be yourself.

"Third brother, when there is more iron, you can go out of the waterway next to the river in the river, and then hang the buckle, the boat card will go up, and the waterwheel will be rotated and driven."

Li Yi felt that he should also perform and drive the hydraulic hanging.

"You make a small one in Zhuangzi first, I'll take a look." Li Longji didn't understand very well, he wanted to see the real thing.

"Uh-huh!" Li Yi agreed, and the light theory was useless.

Zhuangzili made one out of the river, and then made a small model.

Artificially flushed water, placed there for people to see, at a glance.

"If it is feasible, Bi Shangshu should be uncomfortable, and it will cost money." Li Longji said with a smile.

"No, I can have the money to handle this project, I can afford it."

Li Yi didn't care, the matter of money was easy to solve.

"Then he is even more uncomfortable, it has nothing to do with him to make money in the future, you pay for it." Li Longji felt sorry for Bi Gou.

"Third brother, if you work for another year, Lao Bi will have to leave the household department. Yao Chong should go down this year, as well as Zhang Shuo and Lu Huaishen, the prime minister can't stay in that position for too long. ”

Li Yi knew that Li Longji didn't want to stay alone in the position of prime minister all the time.

Yao Chong will inevitably go down this year, it has nothing to do with the mistakes he made, it's the time to come.

After going down, when I encounter problems, I will still ask Yao Chong about politics and adopt it.

A glass of wine can release the power of the army, and the prime minister takes turns to be good.

Li Longji bowed slightly, that's how he thought about it, and that's what he did.

So there is the so-called Kaiyuan prosperous era, which is the prosperous era of the imperial court, not the prosperous era of the people.