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"Is it really okay for the young lord to do this?!" By Liu Mang's side, a middle-aged man looked at the mess on the table and asked with a wry smile.

This one who called Liu Mang the young lord was Huang Zhong, and Huang Zhong has been calling Liu Mang the young lord since Liu Mang saved his Huang Xu.

Liu Mang didn't know where Huang Zhong learned it, and he called it after a few corrections.

Speaking of saving Huang Xu, Liu Mang had a sad tear on his face, because he brought back those anti-inflammatory drugs, Liu Mang once again violated the rules, and the next time he went back, it has become a long way off, but fortunately, this time Liu Mang brought back enough things, most of them are books, mainly these things.

It is useless to be too advanced, and no matter how good a science and technology book is without advanced productivity, it will be in vain.

What Liu Mang is polishing on the table now is some transparent crystals, these crystals are not modern handicrafts but real crystals, which Liu Mang asked Lu Bu to collect in half of the Lujiang River.

That's it, there are only a few dozen pieces, and each piece is a treasure.

Huang Zhong watched Liu Mang casually discard those transparent crystals one by one, Huang Zhong couldn't help but feel distressed, if these crystals were exchanged for gold and grain and grass, they would be enough for an army of 10,000 for several months.

But he was casually put aside by Liu Mang, some were cut, and some were ground into powder, even if he was a loser, he couldn't do this.

"Don't worry! When has the deity been unreliable! Liu Mang replied very casually.

Huang Zhong was also familiar with Liu Mang's style of speaking, and some difficult words came out of his mouth from time to time.

You ask Liu Mang what he is doing? That's right, what he did was a telescope, a weapon of war, and running around with Boss Lu was simply a fixed place, so Liu Mang couldn't think of it, and with the eyesight of Boss Lu and these warriors, it was also comparable to the eagle's eye. Now that Boss Lu has a territory, Liu Mang will naturally not let go of it when he has time, and he originally planned to bring it from this world, but the rules do not allow it.

In desperation, Liu Mang could only do it himself.

These crystals are the materials used to make lenses, and pure transparent crystals are extremely valuable. But Liu Mang was also helpless, although he had a method of refining glass, he didn't get on the right track, so he could only use crystal to make Zuò first, and first improve the combat power of Lu Bu's army.

The pressure on Jiangdong Jingzhou is imminent.

Simple telescope, Liu Mang didn't expect his own technique to be able to make high-end ones. A convex mirror, a concave mirror and a closed long wooden tube fix the two lenses.

It's such a simple method, but Liu Mang spent most of the day invalidating a lot of precious crystals, and then he made a pair.

"That's it!" Liu Mang was very excited to put the lenses into the cylinder, and put them on his eyes to see his results, "Huh?!" As soon as his eyes were raised, Liu Mang's brows furrowed, and he couldn't see anything in the dark! I've broken it!

Liu Mang was about to take off his glasses to take a look at the problem, but suddenly Huang Zhong was blocked in front of him, no wonder he couldn't see anything.

"Twinkle! Old man Huang," Liu Mang said to Huang Zhong with disgust.

"Oh!" Huang Zhong didn't know, so he listened to Liu Mang's words and walked to the side.

Only then did Liu Mang see the scene in the distance from the telescope. Although Liu Mang does not live in the Taishou Mansion, but the house given by Lu Bu is not small, Liu Mang can see clearly at a glance at the branches on the wall opposite the house, according to this distance, this simple telescope actually has a visual distance of about three times.

Looking at Huang Zhong's curiosity, Liu Mang handed over the glasses in his hand.

"Wow!" I only heard an exclamation, Huang Zhong almost threw away the glasses in his hand, fortunately, Huang Zhong was very good in his heart, otherwise Liu Mang would have spent half a day on things.

"This. This! "Huang Zhong can't come back to his senses for a long time, can this thing bring things in the distance closer? If Liu Mang could only see Teng Man on the wall with it, then Huang Zhong could use it to see the veins of those leaves.

Huang Zhong is a military general, everything is related to war, if this thing is used in war, Huang Zhong can't believe it, when others can't see you, you can see each other, this is the prophet of the enemy, sometimes preemptively, it is absolutely the victory of a war.

Standing on a high place? can see the opponent's formation clearly, and the enemy formation will no longer have secrets in his eyes.

"Artifact, artifact!" Huang Zhong's eyes changed when he looked at Liu Mang. If Liu Mang saved his son before, he felt that it was a wonderful hand and was very grateful to Liu Mang, then now it is completely a cult of personality.

"Huh!" Liu Mang was a little embarrassed, and he had goosebumps in his heart when he was looked at by an old man like this, in order not to be killed by this kind of look, Liu Mang hurriedly diverted the topic, "Old man Huang." How is Xingba there? "Gan Ning and Su Fei are training the water army, for Lu Bujun, the water army is a short board at all, although Su Fei and Gan Ning are fierce generals in the water, but they can't withstand the crowd, whether it is Jingzhou or Jiangdong, they are mainly water army, Jingzhou has Cai Mao Zhang Yun, Wen Ping Huang Zu, these are all generals.

Although Cai Mao and Zhang Yun were directly killed by Lao Cao in history, it is undeniable that these two people are definitely at the level of generals for the commander of the naval army.

Huang Zu was even more alone in Jiangxia and blocked Jiangdong for two generations, and Wen Ping was appointed by Cao Cao as Jiangxia Taishou after he surrendered to Cao Cao, and he was guarded for so many years.

In Jiangdong, Sun Ce, Zhou Yu, Ling Cao, Huang Gai, Han Dang....These are all water generals, and Zhou Yu and Huang Gai are even more ruthless, destroying Lao Cao's 800,000 army.

And now there are only more than 5,000 people in the water army of Lu Bujun, and even if another 3,000 people are recruited, it will be less than 10,000, which is really small compared to Jiangdong and Jingzhou.

If the water army hides on the ground of 6, is it still called a water army? Even if Lu Bu is willing, Gan Ning Su Fei is not willing.

So Liu Mang can only give them another way! Liu Mang had never seen a real water battle, but he knew from Gan Ning Su Fei's mouth that their water battle was a round of archers first, and a broadside battle after the difficulty.

The range of the bow and arrow is less than 100 paces, and even lower on a rocking ship, which means that every water battle is basically based on close combat.

In close combat, the 8,000 Bingzhou naval army is naturally no match for the tens of thousands of naval troops in Jiangdong and Jingzhou, but what if the distance is opened? What about the distant battle? The bow and arrow are only a hundred paces away, but there is a thing that has three hundred cloths or even more, he is called a bed crossbow, and the ammunition shot out by this bed crossbow can not only hurt people, according to the current naval warship, three bed crossbows can send a building ship into the bottom of the river in one salvo.

"Young master, Zhong has already been to the camp yesterday! Although Xingba and the others assembled this giant crossbow machine, they could only shoot one round, and it was very difficult to pull the bed strings! Huang Zhong shook his head, although the drawings Liu Mang gave them were more detailed, but the bed crossbow made according to the drawings was far from what Liu Mang said.

The giant arrow can only shoot less than 200 paces, although it can shoot through people, but it is difficult to shoot through the thick ship, and the most important thing is that it is difficult to wind after a round of shooting, and a bed crossbow requires a dozen people to load him with a bow and arrows again.

If it is a water battle, this kind of bed crossbow can only shoot a wave, and a warship can only be placed on top of ten seats, and after one round, it becomes a burden, which not only accounts for weight but also gives the hull less room to let go of troops.

"Can only shoot a wave?!" Liu Mang frowned, if the bed crossbow can only have this effect, then there is no difference between it and nothing, could it be that he spent so much effort and ended up with a chicken rib!

"Cheng Yu!" Liu Mang instructed: "Send this telescope to your father-in-law!" Old man Huang, let's go to the naval camp! "If the bed crossbow is good, Liu Mang is also going to put it in the Chengguan army, this kind of thing is very powerful, although it is not a large scale, but it can give people a deterrent, this is what Liu Mang needs.

In ancient times, unless the normal casualties of those elites were thirty to forty percent, the entire army would disperse, and the people's hearts would panic and their morale would be gone.

Therefore, Liu Mangcai has always asked the rest of the Chengguan Army not to practice first, but this military heart and military soul must be there, only with the military soul can you dare to show your sword, and only with the military soul can you be regarded as a soldier.

When the narrow road meets, the brave wins, and whoever is afraid in the era of cold weapons loses.

And the bed crossbow is a terrifying weapon!