Today is a lucky day, but I sprained my ankle...

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"Kill in an instant?"

After Li Shimin and the other four reacted, there was only this thought in their minds.

If you count the weapons at this time, only a long sword can cut off the head and limbs, but the box is obviously not filled with it. Moreover, no matter how fast the knife hand is, it is impossible to kill twenty people in an instant.

Li Jinan protected Li Shimin with some courage, "What are you doing here?"

Yuchi Gong and Xue Wanjun also came to their senses, standing next to Li Jinan, each putting their hands on the hilt of the knife, and looking at Yin Qingfeng vigilantly.

Yin Qingfeng smiled bitterly and took a step back slowly, "Uncle Li, two generals, there is no need to be so nervous, right?"

Li Jinan, Yuchi Gong, and Xue Wanjun did not say anything, but stared at Yin Qingfeng with great caution.

Li Shimin was also startled at first, "Good guy~~~ Kill twenty people in an instant! Even if you shoot ten thousand arrows at once, you can't do it~~"

However, seeing Li Jinan protecting him and Yin Qingfeng's retreating movement, he realized that there was a misunderstanding here.

Li Shimin patted Li Jinan on the shoulder, "Jin'an, he is your nephew."

"Hey~~This kid is really good at talking~~~"

Yin Qingfeng was still interested in muttering about Li Shimin's language skills. Li Shimin did not say that he was his future son-in-law, but instead said that he was Li Jinan's nephew. In one sentence, he confirmed his relationship with Li Jinan's uncle and nephew, and at the same time, it also caused a small gap between him and Li Jinan.

"Awesome~~~"

Yin Qingfeng complained in his heart, but he was mentally prepared for their fierce reaction, "This baby, my nephew, is named Gunpowder. I wonder if my uncle wants to see its power?"

Li Jinan said tremblingly: "How do you... want to try?"

Yuchi Gong and Xue Wanjun were even more nervous and led Li Shimin backwards.

Yin Qingfeng looked at them like this and felt helpless. He said in a depressed tone: "Then please step back for a while."

Li Jinan's nervous face was obviously relaxed a little, while Yuchi Gong and Xue Wanjun rushed to retreat with Li Shimin. On the contrary, Li Shimin retreated slowly and realized very calmly.

Yin Qingfeng didn't care what their mentality was now. He opened the box, took out two gunpowder tubes from it, and then placed the wooden box on the ground.

Under the nervous gaze of the four people, Yin Qingfeng slowly walked to the rock on the side of the cement board.

This rock is granite more than one person tall. One third of the exposed surface, there is also a narrow crack. It was because Yin Qingfeng noticed this crack that he decided to do an experiment on this stone.

The stones used for paving are generally limestone, which are much softer in hardness than granite. If the granite in front of him can be broken, it proves that the gunpowder tube he made is enough to mine stones of any hardness.

Yin Qingfeng squatted down and stuffed the two gunpowder tubes into the gap. He lowered his head and found two dead branches on the ground to fix the gunpowder tubes. He looked back at the four people who had retreated. After estimating that their distance was safe enough, he took out the flint from his body.

After a few "tap" times, the fume quilt was ignited. Yin Qingfeng picked up the fuse and brought the fume over. When the fuse was ignited, he threw down the flint and turned around and ran.

The thin bamboo tube is not the simple matching black gunpowder that is in ordinary firecrackers. Not only is the most perfect match, but even saltpeter and sulfur are refined.

The method to make saltpeter is: wash the radish and slice it, put it in a pot and add water to boil it thoroughly, add saltpeter and cook it together. After all the saltpeter has dissolved, take it out, filter it and pour out the upper liquid, cool it until recrystallizes, and take out the crystals and dry it. It is also more interesting to take out the clean sulfur blocks and cook it together with the tofu. When the tofu turns black and green, take it out and then dry it.

In order to make sulfur, Yin Qingfeng had to make tofu first. Originally, he thought the book recorded that tofu was invented by Liu An, the king of Huainan, the grandson of Liu Bang, but after asking everyone, he knew that there was such food in the world.

But thinking about it, there is no mention of tofu in more than 6,000 Tang poems about objects. Instead, many poems about tofu appeared in the Yuan, Ming and Qing dynasties.

Yin Qingfeng, who accidentally "invented" a new thing, is now fleeing in a hurry. He dare not joke about his life.

The subject of his experiment this time was granite with high hardness. In order to ensure the effect, he stuffed two gunpowder tubes into it. God knows how much sputtering damage will occur after the explosion.

As soon as Yin Qingfeng hid behind the tree, he heard a dull "bang". Not long after, he heard a crackling sound.

After the sound passed, Yin Qingfeng walked out from behind the tree and went to the rock.

The granite still stood there and did not move, but with the crack as the origin, a large piece of it was cut off from the top and bottom.

He pinched his chin and felt very satisfied. This blast was only carried out using the original conditions. If he had chiseled a few more blasting holes on this rock, he believed it had been crushed to pieces.

From this point of view, even without nitrifying glycerin and mercury lysate, this black gunpowder alone is enough. Of course, he may be able to produce nitrifying glycerin, but he will not be able to do it.

The problem now is that the power of gunpowder has passed, but judging from the attitude of Li Shimin and others, it is really difficult for him to pass the barrier.

Yin Qingfeng was thinking about his thoughts, and a voice sounded behind him: "Hey..."

He turned around and grinned when he saw Yuchi Gong's trembling look. However, when he saw the expressions of the three people in the distance, his heart sank again.

The acceptance of new things varies from person to person and from environment to environment. Li Shimin and the other four are understandable, but this fear must be eliminated. Otherwise, not only will his efforts be gone, but his life will be lost.

Yin Qingfeng picked up the wooden box and walked towards Li Shimin.

As he got closer, Li Jinan and Xue Wanjun became more and more nervous. Yuchi Gong was by his side several times trying to hold him, but seeing that Li Shimin did not express his opinion, he had to keep an eye on Yin Qingfeng's initiative.

Yin Qingfeng stood ten meters away from Li Shimin, and smiled on his face, "There are eight fire detonators in this box. I wonder if Uncle Li can keep them on his behalf?"

Li Jinan knew that this "Uncle Li" was talking about him. When he heard that he was asked to keep these extremely powerful things, his heart beat violently a few times. But out of loyalty to Li Shimin, he gritted his teeth and walked forward slowly.

Just as he reached out to take the wooden box, he picked up the wooden box with one hand.

Li Jinan trembled all over and shouted in a daze: "Your Highness..."

It turned out that just as he was terrified and moved forward, Li Shimin suddenly stepped faster than him.

Li Shimin stared at the wooden box and made a ban on the sound with his other hand.

Because of the angle, Yin Qingfeng certainly knew Li Shimin's actions. Because he had no distracting thoughts in his heart, he calmly allowed Li Shimin to take over the wooden box.

Although Yuchi Gong and Xue Wanjun knew that Li Shimin's actions were a bit rash, they didn't know why they did not stop his actions.

So, the only one who is most nervous now is Li Jinan.

"Your Highness..."

Li Jinan shouted softly to Li Shimin again uneasy.
Chapter completed!