Han Xiaofeng returned to the room, lying on the bed, thinking about what had just happened, and was very conflicted. I don't know what to do, if the gun is successfully developed, Datang will definitely fall into the war, then I don't know how many people will die, won't I become a sinner in history.

Alas, no matter what, let's save my life first, and then let's talk about it, it is not possible to build a cannon in a day or two with the technical conditions here.

Early the next morning, Han Xiaofeng was awakened by a knock on the door. "Han Gongzi, are you up?"

Han Xiaofeng woke up in a daze, opened the door and saw a young woman of eighteen or nineteen, with a delicate and lovely appearance.

Han Xiaofeng said, "Is there anything this girl looking for me?" ”

The young woman replied, "My name is Xiao Tao, and the prince asked me to serve Han Gongzi. ”

Han Xiaofeng thought in his heart. Serve me? Surveillance me's pretty much the same.

Xiao Tao continued, "Master Han came with me, and the prince arranged a new room for Childe. ”

Yo he, this is a good treatment, change the room to send a maid, why not send a wife.

The maid Xiaotao led Han Xiaofeng to walk around for a while, confusing Han Xiaofeng. There are doors everywhere along the way, similar to a beehive, and if you go alone, you will be sure to get lost.

Finally arrived, Xiao Tao took out the key to open the door and said, "Han Gongzi, this is your room, room No. 1." ”

Han Xiaofeng was quite surprised, this made the hotel almost the same, so he handed in his ID card to check in.

The room is prepared with a change of clothes and daily necessities, and even the four treasures of the study room are available, at least the president's set according to the level.

Xiao Tao took Han Xiaofeng to visit the room and said, "Han Gongzi, please take a bath and change clothes here, and I'll prepare breakfast." ”

I can finally take a comfortable bath, I haven't taken a bath for ten days and half a month, sweat and blood are mixed together, and the whole person is about to get moldy and lice, which feels more sour than Laotan sauerkraut.

After breakfast, Xiao Tao took Han Xiaofeng to the place where firearms were studied, the slope of the road was getting more and more inclined, and it should be going underground. The two of them walked for nearly an hour and hadn't arrived yet, so Yang Xiu wouldn't have hollowed out all the ground.

After continuing to walk for more than ten minutes, he finally came to a stone wall, there were many uneven places on the stone wall, Xiao Tao pressed a few times in a certain order in the uneven place, and the stone wall opened from the inside with a rumbling sound.

Han Xiaofeng had to sigh at the wisdom of the ancients. This is completely like a modern combination lock, and this combination lock can only be opened from the inside, the outside can not be opened, can only play a role in transmitting signals, the password is entered correctly to know that the outside is their own people, this can enter.

There is also a corridor inside the stone wall, but here the guards are more heavily guarded, and they are all armed to the teeth, all wearing battle armor and armed with long knives. You don't have to try to know that the combat effectiveness is extremely strong.

Xiao Tao led the way in front, and there was a faint sound of tinkling and knocking on iron. Not far away, there was another iron door. Xiao Tao turned her head to Han Xiaofeng and said, "Master Han, this is the quartermaster office, no one will take you, don't walk around, these soldiers will kill strangers directly." ”

Han Xiaofeng didn't answer, not that he didn't answer, but he was so surprised that he forgot to answer. It's hard to believe. It's all a town underneath, full of lights, houses, and pedestrians. Children chase and fight, chess and tea are played in the old people's home, and young women do laundry and cooking. It's just that these people have a sickly whiteness because they haven't seen the sun for a long time.

If it weren't for the guards around, everyone would think that this is a paradise and not a cage.

The structure here is actually very simple, the overall layout is in the shape of a field, there is an underground river in the middle, and the two sides of the river bank are made of iron and cast weapons. There are three horizontal streets on both sides of the river, and there are three or four hundred houses, some large and some small, and they are about to catch up with a small-scale township.

Xiao Tao didn't speak along the way, let alone introduce a little bit of information here, she didn't look good, she just walked with her head bored, crossed two intersections and took Han Xiaofeng to the gate of a compound and said, "Master Han, we have arrived." ”

Xiao Tao knocked on the door, and a guard opened the door and said, "Please show the prince token." ”

Xiao Tao took out a golden token from his sleeve pocket, and the guards stopped caring when they saw it, and stood aside to be the door god.

There was a big smell of gunpowder in the courtyard, and more than a dozen people were working hard, and no one paid any attention to Han Xiaofeng and the others. In the center of the courtyard was a large iron box, which contained traces and residues from the explosion, which should have been used for explosion experiments.

The two of them stood in the yard for about ten minutes and ignored me, which was a little embarrassing, didn't they call me to help, why didn't anyone pay attention to me? If you don't care, you won't care, I don't want to help you anyway. Han Xiaofeng completely hung up with a posture that he had nothing to do with himself, looking east and west.

It's quite interesting to see other people doing things, an old man, probably sixty or seventy years old. His face was covered in ash, and he was making something that resembled a grenade, quite like a large firecracker.

There is also a middle-aged man who fills gunpowder into a bamboo tube, ties it to the arrow, and uses the range of the arrow to cause long-distance killing, which should be the most reliable design under the current level of science and technology.

The most surprising thing for Han Xiaofeng was a young man, a little older than Han Xiaofeng, his design was closest to a cannon, and his lethality was also the largest. His design principle is simple, make two bowls of wood, buckled upside down. Then fill the gunpowder into it, leave a lead, ignite it and shoot it out by a trebuchet to be killed, the principle is similar to that of a cannon, except when the explosion and the power of the explosion become a difficult problem to control.

The young man noticed that someone was watching him experiment, so he asked, "Do you know this, this brother?" ”

Han Xiaofeng nodded and said, "I know a little bit about it, I don't know what your round thing is, can you tell me about it." ”

The young man said, "You know gunpowder too?" This is a new thing, don't look at him so little, it's powerful. Look at me, I call him a missile, and he launches it with a trebuchet, so he must be a good hand at attacking the city. ”

Han Xiaofeng said with a smile, "Really? What if the missile explodes before it reaches the opponent's castle tower? ”

"It's not easy," said the young man, "just push the trebuchet closer." Why don't you just make the lead a little longer?"

Han Xiaofeng said again, "If you push the trebuchet too close, the enemy can attack you with a bow and arrow, so won't the range advantage of the trebuchet be gone?" That's not as good as a bow and arrow. Do you say it is?"

The young man said embarrassedly, "I didn't expect this, Brother Tai is really wise, and he found the problem at a glance, I don't know Brother Tai's surname?" ”

Han Xiaofeng said, "Under Han Xiaofeng"

The young man said, "In Xia Lu Chao, Lu Ban's descendants." ”

I'll go, the descendants of Luban, in modern times, there is a kind of Luban bird that is very popular in D audio and video, but unfortunately I haven't seen it with my own eyes, so I asked, "Then will you be a Luban bird?" ”

Lu Chao said with a blank face, "What is the Luban bird, I will only be a trap bird." ”

Han Xiaofeng said, "Trap birds? Can this bird fly, and how far can it fly? ”

Lu Chao laughed, "Brother Han, do you say that this flightless bird can be called a bird?" If the bird I made can't fly, then I won't have the face to see my grandfather. As for how far you can fly, it depends on where you are, if there is wind, you can fly for half an hour, and if there is no wind, it will be half a pillar of incense. ”

Is it so awesome? There is wind that can fly for an hour, which is comparable to a toy airplane.

Han Xiaofeng said, "I'll teach you to improve your missile, how about you teach me to be a trap bird?" ”

Lu Chao said happily: "Really? You can't go back. ”

Han Xiaofeng stretched out his hand and high-fived Lu Chao as an oath: "A gentleman's word, a quick horse, a whip, whoever repents is a grandson." ”

Some people followed the trend at the beginning, and others knew the crux of Lu Chao's missile when they heard Han Xiaofeng's words, and said that they could help him improve, which made their eyes shine.

Several other people accosted Han Xiaofeng one after another, saying something to point out. Han Xiaofeng didn't want to bring those big killers to Datang, and it was impossible to bring them to these thieves, so he said a few perfunctory words without pain.

Later, I heard Lu Chao say that their inventions are directly linked to the standard of living. If the research yields results, you will be able to eat meat and drink alcohol, even women, and of course, the best thing is to go to the rooftop every three days to bask in the sun for two hours. If there is no result, you can only eat steamed bread and pickles.

This Yang Xiu is really smart, the silver here is useless, and the reward points are the most ordinary wine and meat to stimulate their motivation.

The results are also obvious, the armor and weapons of the soldiers here are indeed better than the Tang soldiers that Han Xiaofeng saw.

According to Lu Chao, this underground cave is an iron ore vein, and it has been more than twenty years since their first people. There are three main types of people here now. One is the orphans of the previous dynasty who followed Yang Xiu before, and the second is the people who were caught in to do research and do coolies. The third type is their multiplicated offspring, which has never been to the outside world.

Most of these soldiers are of the third type, and they generally do not meddle in the life of the place, but only maintain order.

Han Xiaofeng was shocked when he heard this, is this Yang Xiu a psychopath, it feels terrible to think about keeping these people underground for decades.