After Chen Hao left, Qin Feng asked people to call Liu Hui.

"Meet the young master!"

"Get up, you've been training well in the past two months, and I'll bring you the training materials for the second phase tomorrow!" Qin Feng said to Chen Hao.

"Young Master Xie!" Chen Hao's face was overjoyed, the training method Qin Feng gave him last time had benefited him a lot, but he didn't expect that there would be a second stage here.

"Alright, let's go!"

After Liu Hui left, Qin Feng got up and found Li Ke, who was resting, and returned to Qinzhuang.

There was nothing to say all night, and on the second day, Qin Feng and Li Ke took Chen Hao to the construction site with the only made explosives. The dirt in front of the mountain has been cleared, and all that remains is a whole boulder. With the current situation, there is really no way to do anything about these boulders, and it is tantamount to a fool's dream to use manpower to open the way in this mountain. After coming back to his senses, let's blow up, and beckon Li Ke to send guards to clear the field, after all, it is too dangerous to blow up the mountain, and Qin Feng doesn't want any casualties.

After a while, there were Qin Feng, Li Ke and Chen Hao left on the field, as well as the guards who were guarding in the distance.

"Let's get started!" As soon as Qin Feng gave the order, the craftsmen took out their tools and began to work, starting to punch holes in the gable. An hour later, there were neatly lined up holes on the gable, and the next step was to fill the explosives, because there was no electric ignition now, and only the lead could be pointed, so under Qin Feng's explanation, the lead of each explosive was ten meters long, leaving enough time for igniting the lead, after all, the amount of explosives today was a hundred times more than that of yesterday's experiment.

After filling the explosives, Qin Feng took Li Ke and the craftsmen to withdraw five miles away, and asked the guards to clear out all the personnel in the surrounding three miles, and also asked the guards to patrol the surrounding area to ensure that the surrounding villagers would not enter by mistake.

And under the rocks, all the explosives leads were gathered together, and the one who stayed behind was a guard beside Li Ke, who was wearing a strong suit and holding a jujube horse next to him, which was all requested by Qin Feng, because there was no instant communication tool, so he could only agree on a time to take everyone to evacuate the guards here before igniting the fire, and the remaining horses were to let the guards speed up after igniting the fire.

Half an hour later, the appointed time had arrived, and the guard lit the fuse with a fire breaker, and the white smoke ignited, and the guard turned over and ran out quickly. After about four or five minutes, Qin Feng had already seen the guards riding horses in his direction five miles away. As soon as the guards arrived, and were about to salute Li Keqin, there were several loud noises from the other side of the mountain, and then the rolling dust began to spread from the other side of the mountain to the surroundings.

Qin Feng, Li Ke and the others waited for about half an hour before the dust gradually dispersed, and Qin Feng, Li Ke and the others walked towards the place where they had just been bombed. When the few people walked two miles, they gradually began to see some gravel scattered on the road, and the more they walked inside, the more rubble gradually increased.

A few people came to the mountain, the mountain that was still a whole boulder just now had been blown apart and scattered around, Qin Feng looked at the thickness of the bombing, it was about ten meters meters, and the power was okay.

"Xiao Ke, how is it?" Qin Feng looked at Li Ke with a smile.

"That's amazing! This is the same thing we experimented with yesterday? Li Ke said in surprise, when he and Qin Feng were experimenting outside the base yesterday, he didn't care, but looking at Qin Feng's experiments again and again, Li Ke was embarrassed to ask more.

"Yes, it's just that the amount of medicine today is much more than yesterday's, so the power will increase exponentially!" Qin Feng smiled and said.

Looking at the rubble all over the ground, Li Ke approached Qin Feng and whispered to Qin Feng: "Fengzi, this mountain of explosives can be blown up, is it also so powerful to blow up the city wall?" ”

Qin Feng turned his head and looked at Li Ke, it is not a loss to be a prince, this vision is indeed poisonous, but Qin Feng does not want to throw this soil explosive into the war now, this kind of soil bomb is too easy to imitate, if the Taoist priest develops it, then he will lift a stone and shoot himself in the foot, you must know that gunpowder was invented by a Taoist priest. Qin Feng still wanted to wait for his side to research the gunpowder technology before he was ready to take it out again.

But what Qin Feng didn't know, except that he and Li Ke and a few others were prepared, both the people around him and the people who used to work on the cement road were startled by the loud noise and overwhelming dust just now, and the situation here had already been hurriedly returned to Chang'an to report to Li Shimin.

"I'm talking about this later, find someone to clean up the gravel first, and continue to pave the road, I'll hand over Chen Hao and a few people to you first, but you have to pay attention, this thing is too dangerous, you must ask Chen Hao when you use it, and you can't use it privately." Qin Feng said to Li Ke.

"Okay, I'll send someone to watch!" Li Ke looked at the serious Qin Feng, knowing that this was not a trivial matter, and replied to Qin Feng.

"Then I'll go, I'll leave it to you here! I'll go back, if there is anything you can do in Qinzhuang to find me! Qin Feng said and was about to leave.

"Don't be in a hurry to leave, we're doing it here, what about the two ends of the family? The route they built also has mountains! Do you want to follow this method too? Li Ke pulled Qin Feng aside and asked Qin Feng.

"The family is waiting for Chen Hao to deal with it here, now I don't have many people available, this thing is too important, I can't take the risk of handing it over to others!" Qin Feng thought about it and said to Li Ke.

When Li Ke heard Qin Feng say this, he thought about it, and looked at the gravel all over the ground, this is going to fall into the hands of someone with a heart, I am afraid that no one will be sure. It seems that Chen Hao himself has to pay attention to it, not to prevent Chen Hao, but to prevent someone from attacking Chen Hao.

"Okay, I know, I'll send a team of guards to Chen Hao and a few of them!" Li Ke said.

"Okay, let's go, go back and find someone to clean up the rubble and get to work!" After Qin Feng finished speaking, he and Li Ke took Chen Hao and the others towards the resting place.

The two had just arrived at the rest point of the cement road, Li Ke went to call the workers to sort out the gravel, and Qin Feng was about to take the ox cart back to Qinzhuang, but he didn't expect that just as he was about to leave, he heard the sound of horses' hooves and neat footsteps, and looked up to see that it was actually the iron cavalry of the Tang Dynasty, and Qin Feng saw that there were at least 3,000 iron cavalry, and there were many infantry behind, and the entire construction site was surrounded by water. made Qin Feng confused, what is the situation. At this time, Li Ke also hurried to Qin Feng's side when he heard the guard's report, and glanced at Qin Feng, both of whom saw confusion and incomprehension in the other party's eyes.

"Xiao Ke, are you looking for these people?" Qin Feng looked at the iron horses around him, and his heart was a little worried.

"No, I didn't call anyone! Come on, go and ask what's going on? Li Ke instructed his guards on the side.