"Back to Your Majesty, ordinary swords can't break through the defenses of the back armor! Even weapons such as spears will not hurt if they are protected by armor! Lu Chen said with a smile, although this back armor looks as black as an iron sheet, and it is obviously not as thick as the Tang Army's standard armor, but it is made of steel sheets refined by the converter method and steel filling method recently developed by Lu Chen, and the Tang knife and short knife on the back soldier are also steel knives.

"Joke! How can such thin armor withstand swords! Qu Tutong, the secretary of the military department on the side, said very disdainfully.

"Unconsulted, who is this old man?" Lu Chen looked at the old-faced Qu Tutong, Lu Chen arched his hand and asked, secretly thinking to himself in his heart, "If this person is from the family, he will pit you again, if not, let's see who it is!" ”

"This officer and soldier department is still in the book!" Qu Tutong casually arched his hand at Lu Chen, looking down on Lu Chen, although Lu Chen made these things in front of him, but in terms of leading troops to fight, Qu Tutong didn't think that Lu Chen had that ability, after all, he had never heard of Lu Chen's ability to lead troops to fight and what achievements he had, so Qu Tutong inevitably looked down on these things that Lu Chen made.

"It turned out to be Lord Qu, disrespectful! Disrespectful! Lu Chen still respects this kind of general who fights on the battlefield, and as for Qu Tutong, the "hero of Lingyan Pavilion", Lu Chen is even more respectful, these are all the founding heroes of the Tang Dynasty, although Qu Tutong was only forced to surrender to the Tang Dynasty, but he is also a loyal person.

"Well said!" Qu Tutong saw that Lu Chen did not sneer at him like he did with Zheng Shanguo and others, and he also showed some kindness to Lu Chen at the moment, but he still looked at it with suspicion about what Lu Chen said.

"Lu Xianhou, you said that this back... The back armor can resist swords and spears, and the officer is more skeptical about how credible it is! After all, your back armor looks a little too thin! Although Qu Tutong's words at this time were still skeptical, his tone was somewhat softer, not as rushed as when he refuted Lu Chen just now.

"It's easy!" Lu Chen looked at Qu Tutong and said with a smile, "After confirming that Benhou can increase the output of iron materials for a while, can't we verify it?" ”

"Lu Xianhou's words are reasonable, and when the time comes, this official will definitely see if what Lu Xianhou said is true!" Qu Tutong said and arched his hand at Lu Chen.

"I also want to see how good this back army designed and manufactured by Lu Aiqing is!" Li Yuan, who was walking in front, said with a smile.

"The minister promises not to disappoint His Majesty!" Lu Chen responded to Li Yuan very confidently.

Soon Li Yuan and his entourage came to Lu Chen's mansion, which used to be Li Yuan's residence, but when he came here again, standing in front of the door, Li Yuan was stunned, it was really that this Zhuangzi had changed too much from when he came before.

Originally, there were a lot of Zhuang houses in the east and one in the west, but a lot of new brick houses appeared in the distance, and they were all independent courtyards, and many children were playing outside those courtyards, and the roads leading to these courtyards were all hard cement roads, not to mention that Li Yuan had never seen this kind of cement road, and the civil and military ministers who came with him had not seen it, as for Chai Shao and Li Xiuning, it was also the first time they saw it, and when they came some time ago, there was no such road.

And not far away, there are quite a few people working on it, obviously building those brick houses.

"This way..." Li Yuan raised his foot and stomped a few feet on the cement road, and the hard road directly shook Li Yuan's legs and feet a little numb.

"Your Majesty, this is a concrete road!" Looking at Li Yuan's shaking legs, Lu Chen couldn't help but smile and said.

"What is a concrete road?" Li Yuan looked at Lu Chen and asked curiously, "What is this cement?" ”

"This is a building material invented by the minister, this kind of thing is much better than the current clay, mortar and rammed earth, if there are enough numbers and personnel, it will not be difficult to build a city in one night!" Lu Chen explained to Li Yuan with a smile.

"Oh? And such a magical thing? However, if it is easier to use than clay and mortar, is it difficult to produce? The mud made of this water is difficult to produce! Li Yuan looked at Lu Chen with wide eyes, although in Li Yuan's heart, it had been confirmed that Lu Chen belonged to the "Immortal Descending Earth", but Lu Chen was able to make so many magical items in a short period of time, which was even more confirmed.

"How..." Just when Zheng Shanguo was about to refute Lu Chen, before he could say the word "maybe", he felt that someone was tugging at the sleeves of his robe, Zheng Shanguo looked back, and saw Cui Mingan, the waiter of the Yellow Gate, standing beside him, behind him.

"Daozhen, why did you stop me?" Zheng Shanguo's eyes were full of puzzlement and looked at this Huangmen squire from the Boling Cui clan.

"Lord Zheng, don't be reckless, don't you think this Lu Chen is really not simple?" Cui Mingan reminded in a whisper beside Zheng Shanguo, "This person looks flying and domineering, and is extremely favored by His Majesty, Wang Zhongyun and Wei Xijiu have already suffered losses on this person, you still have a gambling contract with him now, if you provoke him again at this time, I'm afraid it won't be good!" ”

"Hmm..."Zheng Shanguo groaned a little after listening to Cui Mingan's words, nodded, and stopped talking.

"To deal with this kind of person, we must find a chance to kill with one blow!" Cui Mingan continued to remind Zheng Shanguo.

"Dao Zhen is reasonable, if this official gambles and loses, it is necessary to gather everyone to discuss countermeasures, Lu Chen obviously seems to be hostile to our family, and this kind of hidden danger must not be left!" Zheng Shanguo's eyes flashed, and he said to Cui Mingan in a low voice, from Lu Chen's attitude towards Qu Tutong just now, Zheng Shanguo felt that Lu Chen obviously had a very good opinion of the family, and this kind of unstable factor must not be kept.

"Your Majesty, cement is not mud made of water!" Lu Chen couldn't help laughing, for Li Yuan's comprehension ability, Lu Chen could only feel speechless for a while, but if Lu Chen was not a modern person, he would have thought the same way when he saw cement for the first time!

"Your Majesty, the reason why this thing is called cement is because it needs to be mixed with water before it can be used!" Lu Chen explained to Li Yuan with a smile, "Your Majesty, ahead is my Lujiazhuang's workshop, what this cement is, Your Majesty will know at a glance!" Lu Chen pointed to the Lujiazhuang workshop area in the distance and said.

"Then let's go and have a look!" Li Yuan directly handed over Chang Bao and prepared to let Chang Bao serve him on the horse.

"Your Majesty, you need to walk there!" Seeing that Li Yuan was about to turn over and get on the horse, Lu Chen directly reminded Li Yuan.

"Why is that?" Li Yuan stopped getting on the horse and looked at Lu Chen in confusion.

"Your Majesty, look!" As Lu Chen pointed ahead, Li Yuan saw small cars pushing many things in and out of the road ahead.

"If we all ride over, the roads will be blocked, and there will be no place to park the horses in the workshop area!" Lu Chen showed an embarrassed smile and said, "This workshop area was also planned and established for the minister, and there are still many imperfect places, I hope Your Majesty will not blame it!" Lu Chen said to Li Yuan.

"It doesn't matter! I haven't walked around in a long time! It's a good time to have an event! Li Yuan didn't mean to blame Lu Chen, and what Lu Chen said was indeed reasonable, but in Li Yuan's opinion, it was only less than a month, and Lu Chen had already built Lujiazhuang into such a state.

Lu Chen guided in front, Li Yuan followed, a large group of people came to the workshop area, along the way, some craftsmen saw Li Yuan knelt on the ground, saluted Li Yuan, and shouted long live, and the back guard in charge of the guard saluted the army directly.

At this time, there is already a gatehouse in the workshop area, and there are three big characters "workshop area" written on the gatehouse, and there are fence walls on both sides of the gatehouse that extend directly, which directly isolates the workshop area from Lujiazhuang.

After the gatehouse, the first thing that catches your eye is the towering blast furnace, because this thing is too conspicuous, and there is more than one blast furnace at this time, with Lu Chen teaching the steel filling method and the converter method, there are already several blast furnaces standing here in the ironmaking workshop at this time, and under the blast furnace are all brick houses.

"This is..."Li Yuan looked up at the blast furnace standing in front of him, and turned his head to look at Lu Chen beside him with a puzzled gaze.

"This thing is called a blast furnace, and you can use this blast furnace to increase the output of iron!" Lu Chen introduced the blast furnace to Li Yuan while looking at Zheng Shanguo on the side, and at this time, Zheng Shanguo's expression did not show any sincerity and fear, and his face was still calm.

"Your Majesty, it's hot in the workshop, so it's not appropriate to stay for a long time!" Lu Chen reminded Li Yuan, who was about to enter the ironworks.

"It doesn't matter! I want to see with my own eyes how this blast furnace that Lu Aiqing said makes iron! Li Yuan waved his hand at Lu Chen, and walked directly into the ironworks.

As soon as Li Yuan walked into the iron-making workshop, he felt what Lu Chen said about the "heat", and a heat wave came directly to his face, some of these craftsmen in the iron-making workshop were wearing sleeveless cardigans, and some were directly shirtless, with their trouser legs pulled high, and they were constantly fanning themselves with fans, talking and laughing and waiting for something.

As soon as they saw Li Yuan coming in, these craftsmen hurriedly kowtowed to Li Yuan.

"Get up!" Li Yuan took out a silk handkerchief and wiped the sweat from his forehead, "Why don't you work?" Instead talking and laughing here? Li Yuan looked at the craftsman in front of him and asked directly.

"Your Majesty, these craftsmen are waiting for the furnace to be opened! When the furnace is turned on in a while, they are going to wear those clothes, which is just to take time to cool off! Lu Chen pointed to the thick clothes and pants hanging on the wall on the side and explained to Li Yuan.