"Yes, that's good. Compared to the bluestone used in the construction of Warcraft City, Zhao Feng's frowning brows relaxed, "No. 1, what material do you use for this cement?" This is an important matter related to cement production.

"Young master, nothing else has changed, but some more magic crystal powder has been added, but I didn't expect that after mixing with magic crystal powder, it can reach such hardness. No. 1 hurriedly said that last night, if No. 4 hadn't had to try the magic crystal powder, otherwise it would not have been possible to make cement today.

"You can make a cement slab three meters long and wide now, yes. "After all, it needs magic crystals, magic crystals are not like ores, although the Zhao family has collected more magic crystals over the years, but if it is used to make city walls, it is categorically not enough.

"It's the young master. The four of them rushed to the laboratory excitedly and began to make cement slabs.

Seeing the four people doing it in full swing, Zhao Feng thought to himself, he was really a fool, he actually forgot about the magic crystal powder after arriving in the other world, and he was about to try the gunpowder, so try it now, if the gunpowder succeeded, what kind of monster would he be afraid of attacking the city.

Zhao Feng said to do it, there are still a lot of gunpowder materials left in the laboratory, after all, he has always had a very big idea of gunpowder.

"Haha, success or failure is here. Zhao Feng made the gunpowder that had been miserably entered into the magic crystal powder, and hurriedly took it to the yard for experiments, this time it was half smaller than the last basketball. I don't dare to do it too much, if I do it too big, if I succeed, I blow myself up, but it's funny.

"Poof"

The gunpowder of the miserable magic crystal powder made a sound, a little louder than a fart. But the power is the same as the previous test, and there is not much change.

"Hey, it seems that gunpowder is really not going to work. Zhao Feng sighed helplessly.

"The young master has made it. ”

I saw No. 1 to No. 4, a person carried one side and lifted a 3-meter cement slab out.

"Well, that's right, how many magic crystals are used in this cement slab, Zhao Jian, you go and try it." Zhao Feng shouted at Zhao Jian.

The four of them hurriedly put the cement slab on the ground, walked to Zhao Feng's side and said, "The young master has used a total of about one-tenth of the powder of the level 1 magic crystal. ”

"So little. Zhao Feng said with emotion, now he is not afraid that the magic crystal will not be enough.

Zhao Jian ran his fighting spirit and struck at the cement slab with all his might.

"Knock"

With a sound, Zhao Jian felt the sharp pain coming from his hands, and looked at the intact cement board in a daze, this time he did not test it with a fighting spirit one by one, but with a full blow, and he didn't break the cement board.

"Young master, this cement slab is good, I attacked with all my strength and didn't break it. Zhao Jian put his hands behind his back and said to the young master, his right hand behind his back was still trembling.

"Eh, I asked you to try it with a sword, how did you think of using a fist, doesn't your hand hurt?" Zhao Feng looked at Zhao Jian a little speechlessly, and actually tried it with his fist, could it be that cultivating Dou Qi can make people not bad.

"Ah, hey, I'm trying. Zhao Jian smiled awkwardly, young master, you don't have it, aren't I afraid of breaking it.

"Flame Slash"

With Zhao Jian's roar, a huge flame rushed out from Zhao Jian's sword.

"Bump"

After a loud bang, all of a sudden, the entire cement slab was wrapped in flames.

"Young master, I don't think I'll try it, if I break this cement board, won't it cost me my life!" Looking at the cement slab in front of him, which only had some gravure marks, Zhao Jian said a little speechlessly. How many times did he have to cast a flame slash to shatter the cement slab, and he couldn't help but shudder when he thought about it.

"If you want to break it, I won't let it go. Zhao Feng glanced at Zhao Jian, touched his aching face that was smashed by cement debris, and continued. "Hurry up and carry the cement slab, and let's go to my father's. ”

"Has it been confirmed?" Zhao Tian asked with a resolute expression, because he knew that as long as this matter was confirmed, it would cause an uproar in Warcraft City.

"Yes, it has been determined, according to the soldiers who went deep into Warcraft City, the Warcraft have begun to retreat collectively, and the retreating Warcraft do not attack each other, which is very mild with the traditional Warcraft siege prelude. According to the records from Warcraft City, Warcraft will attack Warcraft City in almost a month, and no more than 3 months at the latest. An older soldier replied in the affirmative.

"From now on, all the troops will return to Warcraft City, ready to resist the attack of Warcraft. Announce to the residents of Warcraft City next week that Warcraft is about to attack, and you hurry up to gather supplies these days. Zhao Tian gave the order. Although he was mentally prepared, when he heard the exact news, Zhao Tian couldn't help but be irritable.

"Father, show you something good. Zhao Feng took Zhao Jian, who was holding a cement slab, into the conference hall.

"Hehe, you wait a minute. Seeing Zhao Jian come in carrying a huge stone, Zhao Tian smiled at Zhao Feng with a smile, turned his head to the soldiers and said, "Everything is like this first, you have to hurry up and prepare, time is not waiting for you." ”

"Son, wouldn't it be this stone that you want to show me?" Zhao Tian looked at his son suspiciously, what is so beautiful about a stone.

"Yes, father, this is the cement board I made, don't underestimate the cement board, Zhao Jian's attack can't break this cement board. Zhao Feng said to his father solemnly, his father had a conversation with the soldiers, he had already seen some clues, it seemed that the siege of the demon beast was already a sure thing, and now it was necessary to quickly let his father rebuild the city wall.

"You made it. Zhao Tian hurriedly squatted down, looked at the cement board carefully, did not use his fighting spirit, and slammed down the cement board with all his strength.

"Knock"

After a loud bang, the cement slab was unharmed, leaving only a shallow fist print on it.

"This cement board is good, what does it take to make these cement boards, is it easy to manufacture. Looking at the shallow fist marks left on the cement board, Zhao Tian knew the hardness of the cement board, after all, he knew his strength best. Even Qingshi couldn't stop the punch that he didn't release his fighting spirit with all his might, and now Warcraft City is in short supply of defensive means.

"If you want to make the hardness of the cement board in front of you, the material is very simple, it is some white stone, slag, clay and magic crystals and the like, this is the detailed information of making cement, if you still can't understand it, father, you can go to the laboratory and call my house slaves, this cement is made by them. Zhao Feng hurriedly handed the cement formula recorded in No. 1 to his father, with the current situation, the cement secret recipe would definitely not be able to be kept.

"Haha, son, you're a great accomplishment this time. ”