Take the system to become Uncle Liu

Liu Bei looked at the bed crossbow in front of him carefully, had he seen and used the bed crossbow before, and he knew the basic structure.

Looking at and thinking about the new bed crossbow, Liu Bei found that the basic structure is still the same, but the key parts have changed.

The rear base of the bed crossbow has become retractable, so that it can shoot underground targets more accurately. The hinges and traction ropes have all been made of iron, as well as the traction hook. Everything has become stronger.

The reason why the previous bed crossbow was so easy to damage was because these parts were easily damaged, even though they were all small parts, once the whole bed crossbow was damaged, there was no way to use it.

Now that these parts are reinforced, Liu Bei feels that the life of the bed crossbow will be longer.

As if seeing Liu Bei's curiosity, Ma Jun and Lu Ban called a few people and pushed the bed crossbow in front of them to an open place. There was a huge archery target in front of them, and behind the target was a long wooden shield.

"Crack! Kick! Kick!"

Under the rotation of several strong men, the pulley of the bed crossbow began to rotate, and the main bow, front bow, and back bow began to draw in. At this time, a soldier put an iron arrow in the arrow slot.

Liu Bei watched the chain gradually tense, and the main bow, front bow, and back bow began to accumulate strength. This time, the bow and arrow were no longer made of iron, but the whole body was made of iron. He felt the inspiration from this iron arrow. The power of the soul, such an imposing manner, I am afraid that no one can resist this arrow.

"Boom!"

Like a thunderbolt on the spot, Liu Bei covered his ears subconsciously, and Yu Wencheng was stunned by the huge movement.

Frightened by the powerful momentum, Liu Bei quickly turned his head to see how the target was doing. He saw that in this empty shooting range, let alone the target, even the wooden shield behind the target had been torn apart, and iron arrows were passing through it. After the wooden shield, it flew for a certain distance before landing on the ground.

"Ma Jun, how long is the wooden shield in total?"

"My lord, this is a wooden shield specially designed to test the power of the bed crossbow. We purposely lengthened it a lot, and it has a total distance of 3 feet."

Thirty feet, which is a distance of 10 meters. Although the quality of this wooden shield is definitely not as good as the wooden shields used in combat, the power of the iron arrow cannot be ignored. If this iron arrow is shot at Li Yuanba, the scene Liu Bei I get excited just thinking about it.

"Chengdu, how powerful is this bed crossbow?"

"My lord, this arrow is very powerful. For the sake of the general, if this arrow lands on the general, it will be very dangerous."

Hearing this, Liu Bei was very excited. He had already begun to fantasize about taking these bed crossbows to shoot Li Yuanba.

"My lord, although these bed crossbows are powerful, they need to be arranged in advance, and they take a long time to launch. Li Yuanba has already suffered from the bed crossbow before, and the opponent will definitely be prepared. If you can't hit a hit, then try to shoot again." It will be more difficult to hit the other side.”

What Yuwen Chengdu said is right, that is, Liu Bei himself has a faint sense of danger, not to mention that they are god-level generals, and they are even more alert to danger, so this is why the top generals generally do not die on bows and arrows , Once someone targets them, they are already prepared.

Liu Bei decided that when the time came, he had to plan carefully, and he must shoot and kill Li Yuanba in one blow. Once this person died, Li Shimin would be like an eagle without wings, so there was nothing to worry about.

"Lu Ban, Ma Jun, although the bed crossbows last time were powerful, they are far less effective than this time. How did you improve these bed crossbows?"

Although he doesn't know much about these technologies, Liu Bei still can't help but want to ask them, there is nothing wrong with knowing more.

"My lord, I can't break through the technical level. Master Lu and I are helpless. Only when we find these black stones can we improve our technology again. Please come with us, my lord."

After saying that, Lu Ban took Liu Bei to a huge open-air iron ore warehouse, and then Lu Ban pointed to a warehouse and said.

"My lord, this is the "black stone" accidentally discovered by our iron ore mining personnel. These stones are not iron ore that can be smelted into iron, but these black stones can be burned, and the temperature is higher than the previous wood, which makes our efficiency more efficient. It has been greatly improved, and the ordnance that could not be made because the temperature could not reach it before, can now be completed with these black stones."

Liu Bei looked at Lu Ban's excited look, and then looked at the "black stones" in his mouth. When he looked carefully, they seemed to be coal!
Bingzhou is the Shanxi of the later generations, and the probability of finding coal is very high, but it is luck that people like Lu Ban find that the coal can be burned.

Liu Bei looked at these coals with excitement in his eyes. The discovery of coal in this era can be said to be a breakthrough across the ages for his own power and heating.

"What is the production of these coals now? How much?"

"Coal? My lord, are you talking about these black stones? Our people have discovered two huge black stone mines. So far, we haven't detected the exact size of them, but according to the estimation of the miners, the scale is very large, which is completely enough for our army to use."

That's right, despite the fact that there is coal and iron ore now, the current level of mining is limited, and it is far from being as advanced as later generations.

Liu Bei originally wanted coal to be available to all the people, but after this calculation, it is impossible to popularize it to the whole people. The mining cost is destined to be used only by wealthy people.

"Berwin, we have mined more and more mineral veins, and the protection of these places must be strengthened. These are the foundations of our army. Once they are destroyed, the consequences will be disastrous."

After seeing the power of the bed crossbow, Liu Bowen was convinced of it, especially the flammable black stone, which is the basis for the continuous updating of his army's equipment, and can even be used for heating. It has so many uses, it is just like a treasure .

Liu Bei walked in to figure out the coal. The coal was smashed into small lumps and transported here by truck by truck. The cost was extremely high and the output was not large.

Liu Bei decided that except for a very few people, the coal should still be mainly used for industrial companies, allowing them to continue to develop ordnance.

"Lu Ban, after having these coals, have any improvements been made to our ordnance?"

"My lord, since we have these coals, our smelting temperature has been greatly increased, and the efficiency has increased by at least [-]%. Ma Jun and I also discovered that after firing the cooled molten iron many times, the weapons produced The hardness and toughness are greatly improved."

"Although there were records about this technology according to the classics before, due to the fact that the fire temperature is not high enough, this technology has not been popularized, and the efficiency is extremely low. We are studying this matter. If it goes according to what we think, we will Military weapons will usher in a huge change."

Listening to Lu Ban's elated report, Liu Bei vaguely felt that Lu Ban seemed to know the technology he mentioned, but he never remembered what it was.

If he couldn't figure it out, he didn't continue to think about it. Liu Bei arranged for people to send the 20 bed crossbows to You Beiping, and after he praised Lu Ban and Ma Jun, he left the company with his people and went back on the way. Liu Bei has been thinking about what the weapons after the reform mentioned by Lu Ban will look like.