"Son, please see my father!" Li Yan entered Liangyi Hall and saw Li Shimin wholesale memorials after writing the case. He immediately stepped forward and walked the ritual path, and Yuwen Hu followed closely behind.

"Well, get up!" Li Shimin raised his hand and said, until he finished reading the memorial in his hand. He raised his head and looked at Li Yan, but found that his face was dark and the two dark circles on his eyes were very eye-catching. He smiled and said, "Liu Lang, although you are a happy wedding, you must be restrained. It is not good to indulge yourself too much at such a young age."

Li Yan was stunned after hearing this, remembering the story of Wen Xin telling him the middle of the night last night. Today, his face must be bad. In addition, his newlyweds, it is no wonder that Li Shimin misunderstood.

"Yes, my son, Jin, teaches his father!" Although Li Yan shouted injustice in his heart, this matter cannot be explained explicitly. If someone knows that he and Xiao Wenxin have not had sex yet, why don't the others discuss it? It is estimated that Li Shimin and Xiao Yu alone can tear him into pieces and swallow him alive.

"Liu Lang and Yuwen Aiqing come to find me, but what's the point?" Li Shimin put down the memorial and finally noticed Yuwen Hu behind him. He was a little surprised. He couldn't understand why the two of them came together, so he asked.

"I have reported to my father, and I have a very important thing to come with Lord Yuwen today," Li Yan replied with bowing.

"Oh? Could it be that the new type of fireworks of the magistrate?" Li Shimin frowned. He knew that Li Yan handed over the fireworks to the magistrate. Now the two of them came to find him together, which naturally reminded him of the fireworks. However, if it was really for a firework to disturb his review of memorials, Li Yan would be too ignorant of the importance.

"Father, although this thing is related to fireworks, it is not for people to watch, but for killing people!" When Li Yan said the last sentence, his tone became a little cruel. The appearance of gunpowder marked the official entry of thermal weapons onto the stage of history, and the emergence of thermal weapons will directly change the form of human war.

In the era of cold weapons, although the war seemed very tragic, in fact, only a few people died directly on the battlefield. Most of the people died because they were injured and did not have good medical treatment. But the hot weapons were different. A shell was within the range of killing, and a war of more than ten meters or even hundreds of meters was within the range of killing. After a war, it would be like a game to die. For example, in later World War I and World War II, millions of lives were filled. If this was in the era of cold weapons, the war of millions of people would probably have to be fought for at least dozens or hundreds of years. Of course, the massacre of civilians is not counted. Only the number of deaths in wars is recorded here.

Li Shimin was stunned when he heard this. The things used to kill people were also related to the brilliant fireworks, which made him a little curious and asked again: "Liu Lang, what is it?"

"This..." Li Yan didn't know how to explain it, and he just spoke out in vernacular terms. Even if he was talking about it, Li Shimin couldn't believe it, so he pondered for a while and could only say, "Father, you'd better go out and take a look in person. This thing is used to equip my Tang army with the power of breaking mountains and cracking stones. My sons were afraid of danger, so they didn't dare to bring it to the hall."

Li Shimin heard what Li Yan said so magical, and Li Yan always knew something new, so Li Shimin was very convinced of his words. He immediately stood up and went to the martial arts training ground with Li Yan and Yuwen Hu to the westernmost martial arts training ground. This is the place where Qianniuwei trained, which is safe and secluded. Don’t worry about disturbing others. Now there are several large boxes on the martial arts field, and the weapons mentioned by Li Yan are placed in it.

Li Shimin originally wanted to go to the box to see what was going on, but Li Yan and Yu Wen Hu disagreed. Gunpowder weapons are no better than other ones. If they accidentally go out of fire, it would be fine to hurt others. If Li Shimin is injured, even Li Yan's son will not end up well. Not to mention Yu Wen Hu, he will try his best to persuade Li Shimin to stop.

Next, Li Shimin and Li Yan watched from behind, while Yuwen Hu walked to the box and directed the person to open the first long box, lifted a large iron tube of one person's thickness from it, placed it in the field from a distance, and brought many stone slabs, stone strips and other things on it, forming a large mountain of stones.

Then he personally connected the lead wires, pulled them for a long time before stopping, and made a gesture to Li Yan, indicating that everything was ready. It was the first time that Li Yan saw the effect of this thing. He was afraid that Li Shimin would stand a little closer to him, so he stepped forward and said, "Father, we are still a little closer. Do you think you should step back a little longer?"

"No, I was a man who fought on the battlefield back then. I haven't seen any dangers?" Li Shimin looked a little unhappy, thinking that Li Yan was too careful and did not have the style of his past. When Li Yan saw that there was no way, he could only ask Yuwen Hu to prepare to ignite the fire, and at the same time let the guards around prepare the shields. If any gravel hits over, it will be better to cover it.

After receiving Li Yan's order, Yuwen Hu immediately ignited the lead, then threw down the torch and ran away. The lead behind him rushed towards Shishan with blue smoke. When Yuwen Hu ran to Li Yan and the others, the lead just burned to the head. Then Li Yan felt that the whole world was paused for a while, and then there was a loud "boom" sound, as if a thunderbolt in the heavens, shaking the earth constantly.

Li Yan saw the stone mountain in the distance explode, and countless gravels and dust flew everywhere, almost covering half of the sky. But they were still not far enough, and a lot of gravels hit the side with the sound of wind. Li Yan saw that many guards around him had their legs collapsed to the ground, and they couldn't stand up, and they couldn't raise their shields to defend.

Li Yan was startled when he saw this situation and directly grabbed a guard's shield and blocked Li Shimin's front, and shouted loudly: "Protect your car, get up and protect your car!"

After all, these guards were well-trained and were just scared by the shocking scene in front of them. At this time, when they heard Li Yan's roar, many people immediately reacted and immediately surrounded Li Shimin and raised their shields to defend.

Only the shield was heard "ping-ping-pong" sounded randomly, and Li Yan also felt that the shield in his hand was hit by several stones. He almost couldn't hold it firmly. After resisting this wave of impact, Li Yan and the others dared to lower the shield. At the same time, Li Yan turned around and looked at Li Shimin, and found that the other party was safe and sound, so he felt relieved.

After all, Li Shimin is an emperor of a generation and has been through battle for a long time. His courage is naturally not comparable to ordinary people, but even so, he was still pale in his face and his arms were trembling slightly. When he saw Li Yan and the others protecting him, he realized and calmed down and maintained a good manner. When Li Yan looked back, he returned to the emperor of the world who had collapsed in front of him and his face remained unchanged.

"Liulang, what's this thing?" Before the dust at the explosion was left, I couldn't see the situation inside clearly. Li Shimin pulled Li Yan over and asked anxiously, but he didn't notice that his voice became dry and astringent.

"Qi Bing, this is a blasting tube made of gunpowder. It is mainly used to blow up the other party's city gate or wall when siegeing the city." Li Yan replied seriously, but at the same time he was laughing secretly. It turned out that the emperor's father would be afraid and nervous?

"Blasting tube? OK! Good thing!" Li Shimin rubbed his hands and said excitedly, "Hurry, take me to see how the effect is!" After saying that, he didn't care about the mist of dust ahead and rushed in excitedly. Li Yan and Yuwen Hu had no choice but to keep up.

When I walked to the side, I found that the stone mountain composed of stones had disappeared without a trace, surrounded by gravel stones, and the closer we were to the explosion point, the more gravel stones. When I was placing the explosion tube, I found a deep pit several meters on the ground, and there was even blue smoke coming out of the pit, and the explosion tube was completely unavailable.

"Hiss~" Li Shimin and the guards around him took a deep breath. In their perception, besides the power of heaven and earth, it was hard for them to imagine that there was anything else that could be so powerful? But the facts were right in front of them. They just saw it with their own eyes, putting a craftsman Yuwen Hu at the foot of the stone mountain, and then exploded and it became what it is now.

Li Shimin was excitedly circling the deep pit for several times, and his hands were trembling with joy. After a while, he stopped and asked Li Yan anxiously: "Liulang, how is the output of this blasting tube? When can all the Tang army be equipped with this item?"

Li Yan was stunned after hearing this, thinking that the old man was so happy that he was confused. He just mentioned the principle of the blasting tube. The rest of the matter was done by Yuwen Hu. As for the equipment of the Tang army, this question was even harder to answer. He didn't even know how many troops there were in the Tang Dynasty. How could he answer it?

Fortunately, there was a Yuwen Hu next to him who stepped forward to rescue Li Yan and said, "Your Majesty, the production of the blasting tube is not complicated, it just consumes too much gunpowder, and its purpose can only be used to attack the opponent's city, so its use is limited. Generally, it is enough to keep some in the army, and there is no need to have large-scale equipment at all."

Yuwen Hu's mind was still very clear and his answer was very organized. Li Shimin was just so happy that he was confused. Now that he heard Yuwen Hu's words, he immediately understood and patted his head and said 'yes'. However, he still praised Li Yan and Yuwen Hu. With this blasting tube, the army of the Tang Dynasty can almost be said to be invincible in the future. Even if the tall and solid city walls like Chang'an were blasted many times in the same place, they would probably collapse.

"Father, you just saw that it was a weapon for siege. The following two weapons are more useful and are specifically targeted at the enemy's living forces." Seeing that Li Shimin had seen the value of gunpowder weapons, Li Yan struck while the iron was hot and stepped forward and said again. (To be continued)
Chapter completed!