Three Kingdoms: At the beginning, Sun Jian was advised to fake his death and plot to seize Jingzhou.

"The military advisor wants to borrow a chain to intercept the ship?".

Old man Wu didn't understand what Xiao Zhe meant, but he still analyzed it from a professional point of view

"If you want to intercept ships in this chain, you can't do it carefully, and if you want to make dozens of zhang, you need at least one or two thousand catties of pig iron. "

"How many chains do you want?"

"The more the merrier, at least a dozen!".

Xiao Zhe saw that the old man did not deny it, so he asked

"I wonder how long it will take to make it?"

When Old Man Wu heard this, he immediately made a mistake:

"If it is more than a dozen, how can you get ten thousand catties of pig iron, at least two or three months. "

"Two or three months for so long?".

Xiao Zhe frowned, the secret passage time has been a little long, it is acceptable for a month, and the autumn harvest is about to be harvested in two or three months.

This front dragged on a little too long.

Seeing this, Wang Cheng thought that Xiao Zhe was angry, and hurriedly explained:

"The military advisor doesn't know that such a large object requires a lot of pig iron. "

"They need to make iron, melt iron, hammer. "

"Repeated tempering can ensure that the iron chain continues. "

"Besides, now that our army is expanding, there may be a large number of ordnance, and there are not so many people who can make this thing!"

Xiao Zhe listened and thought:

"In this way, the delay is the progress of iron smelting and iron melting, right?"

"If I raise the furnace temperature, can I speed up the progress?"

When the old man heard this, he laughed and said:

"If the furnace temperature is higher, it can be much faster. "

"But now we have to heat it up, and we need more manpower, otherwise even if the claw is blown out, it won't be much higher!"

The whirl is the ancient blower equipment, which is made of leather, which needs to be operated by one person and pressed by one person, and the efficiency is extremely low.

Xiao Zhe listened, walked slowly to a stove, and watched the fire coal burn, followed by the blacksmith pressing, regardless of the flames gushing out.

Seeing this, he shook his head and said

"Blows like yours are naturally difficult to heat up!".

"Bring a pen and a cloth!"

Seeing this, Wang Cheng didn't know what Xiao Zhe meant, but he still took the order and left.

After a while, there was a piece of cloth and pen and ink.

But seeing Xiao Zhe writing and painting on the cloth, he drew a wooden box-shaped thing after a while, and its internal pieces were drawn one by one.

On the side of the wooden box, there is another circular hole-like object with dozens of round holes on it.

After the painting, Xiao Zhe handed the silk book to Wang Chengdao:

"Let's go and have this box be made into a pair, and the coal will be pressed into this shape!"

Wang Cheng and Old Man Wu hurriedly stepped forward to take a look, both of them were puzzled for a while, but since Xiao Zhe gave the order, the two of them did not dare to delay, and hurriedly left to make people do it.

After the two left, Xu Kun said with a puzzled face:

"Strategist, now that we have taken Changsha, we only need to put on driftwood to intercept the enemy's naval army, why do we need to cross the river with iron chains?"

When Xiao Zhe heard this, he turned his head to look at Xu Kun and said:

"Intercepting the enemy army is a symptomatic rather than a cure!"

"Now that the enemy knows that our army has taken Changsha, he will send a naval army south. "

"If our army does not defeat this naval army, it will be rare to be free!"

"Only by crossing the river with this iron rope can the enemy army be defeated!"

"Ah, can the iron cable cross the river defeat the naval army?".

Xu Kun became more and more confused when he listened.

Xiao Zhe smiled and said

"You'll know when the time comes!"

Seeing that Xiao Zhe sold Guanzi again, Xu Kun didn't ask anymore.

He knew that Xiao Zhe's tactics had always been unexpected, and the less people knew about it, the better.

Now that there are many people, it is not the time to ask.

The two waited like this for a long time, and then saw Wang Cheng come with two people carrying a wooden box, and the old man Wu also made the coal blocks, and the pieces were like honeycombs.

That's right, what Xiao Zhe wants to make is bellows and honeycomb coal.

The reason why the temperature of ancient furnace fires is not high, in the final analysis, is that the efficiency of oxygen combustion is low.

Honeycomb coal, on the other hand, increases the heating area and burns faster.

Coupled with the help of a hand-pulled bellows, oxygen delivery can be increased.

Seeing that the two things were coming, Xiao Zhe asked them to be placed properly, lit a fire, and asked people to put honeycomb coal in it.

Seeing its strange appearance, Old Man Wu said strangely:

"Can this thing really raise the temperature of the furnace?"

"If you can do it, just try it!".

Xiao Zhe asked people to pull the bellows, only to hear the sound of the wind in the bellows, accompanied by a big man pushing it in, and a scorching breath gushed out.

When Old Man Wu saw this, his eyes lit up and said:

"It's strange that this thing can also come out of the wind?".

As soon as the words fell, a young man beside him pointed to the furnace and said:

"Master Wu, this thing burns so fast!".

When everyone listened, they looked towards the fire, and saw that the honeycomb coal evaporated almost instantly, and the fire continued to rise along the coal.

It takes a long time for ordinary coal to ignite, but the honeycomb coal is thrown into the coal, and after a while, it emits a red light.

Seeing this, Old Man Wu's eyes flashed, and when he turned around, he was like a master, and said in a deep voice:

"Hurry up, get the iron!".

As soon as he shouted, a man of land came with a crucible loaded with pig iron.

Under the scorching heat, the pig iron melts into molten iron almost instantly.

Seeing this scene, Old Man Wu said with joy on his face:

"Okay, good, this thing is good!".

As he spoke, he turned back and said:

"The military division is really effective, with this thing, our army can manufacture ordnance at least 30% faster!".

The high temperature brings not only production efficiency, but also refining quality!

With this high temperature, it can bring qualitative changes to iron again.

Wang Cheng looked at it, and he was also busy saluting

"The military advisor's whimsy, the subordinate admires!".

Seeing the two of them like this, Xiao Zhe grinned and smiled:

"How long will it take for my chains to be here?"

Old man Wu hurriedly said:

"If you send more people, it can be made in two months at most!"

"I'll only give you twenty days!".

Xiao Zhe stretched out two fingers and said

"Take out half of the people to make chains!".

"At this time, I will report to the lord, so you don't need to worry!".

"Can I make another object?"

Seeing that Xiao Zhe gave a death order, Wang Cheng arched his hand and said:

"Rest assured, if you don't make ordnance, within 20 days, the iron chain will be able to be made!"

When Old Man Wu heard this, he picked up another drawing and frowned and said:

"Strategist, it's not a little old man who shirks it, the object on this picture is like a bow and crossbow, like a trigger, an inner tank, etc., but this crossbow body needs to be built by a carpenter!"

"It's okay, you will wait for the crossbow machine, and I will have someone build the crossbow body!"

Xiao Zhe nodded and said:

"Wait for a pair of crossbows to come out, and after they are made, send them to my house!"

When Wang Cheng heard this, he took the order.

Seeing that the matter was done, Xiao Zhe and Xu Kun did not stay anymore and walked out of the workshop.

After coming to the outside of the workshop, Xu Kun asked again

"Strategist, since the chain is to break the enemy's naval army, what is the use of this bow and crossbow?"

"This crossbow is our army's secret weapon!"

Xiao Zhe took the drawing, looked at the crossbow machine on the drawing, and smiled mysteriously

"With this crossbow, our army will be invincible in the future. "

On the drawing, it is a repeater, which can fire ten arrows in a row!

After his improvements, a single crossbow can shoot twelve arrows.

If you go to the battlefield, 1,000 crossbowmen are equivalent to more than 10,000 archers!

Its deterrent power is extremely huge!

When Sun Fu listened, he scratched his ears and cheeks, full of doubts.

It's not like he hasn't seen a crossbow before, a bow and crossbow can be used as a secret weapon!

This military advisor's actions are really incomprehensible!