"My lord, is there anything wrong?" Seeing that Lu Chen was tapping his fingers there as if he was thinking about something, Su Chang couldn't help but ask with a puzzled face.

"Huh? It's nothing, let's send it in three days! Being asked by Su Chang, Lu Chen came to his senses directly, looked at Su Chang and smiled slightly.

"Yes!" After Su Chang gave the salute, he left the front hall.

With Su Chang leaving, Lu Chen reached out and touched a pistol hidden in his waist, and his heart settled down a lot, and the feeling of not being able to grasp his mind just now was also reduced a lot, "It's a blessing or a curse, it's a disaster that can't be avoided", touching the pistol on his waist, Lu Chen's eyes became firm, "Lao Tzu wants to see what this sense of ominousness is all about!" Lu Chen stood up directly, left the front hall, and went straight to the study, he was now going to study the matter of the salt farm.

For salt making, Lu Chen is already familiar with the road, after all, when he was in the Women's Army, he taught Lao Huang how to make alcohol and normal saline, but this time the situation is slightly different from that in the Women's Army, the Women's Army uses coarse salt, and this time the target is those poisonous mineral salts.

Lu Chen turned the book for a while to study how to get rid of the toxicity of poisonous mineral salt, only to find that turning poisonous mineral salt into ordinary salt is just one more step, but this one step stumped Lu Chen, originally Lu Chen thought that he had found a treasure land, but after seeing what he needed, Lu Chen's mentality exploded, because one thing is needed to remove toxins, that is, "activated carbon".

"Activated carbon", this thing is a product of the twentieth century, and it seems unrealistic to make this thing by hand in this era, because it takes a piece of equipment to make this thing, even if Lu Chen rummages through the entire base, he may not be able to find this thing, that is, "pyrolysis furnace".

"What a mess!" Lu Chen, who was sitting in the base looking for a way in the book, couldn't help but scratch his head, if there was no activated charcoal, it would be troublesome for the poisonous salt to get rid of the toxin.

Just when Lu Chen was at a loss, Lu Chen suddenly saw a book, this book Lu Chen had read before, and a lot of knowledge about handmade was written on it, Lu Chen learned about the extraction of alcohol and saline, he learned from this book, Lu Chen looked at this book and thought for a while, Lu Chen suddenly remembered that he seemed to have seen an introduction to charcoal or what charcoal in this book, but at that time it was just to consult alcohol and saline, and nothing else noticed, Now Lu Chen can only put his hope on this book.

When he saw "how to make self-made activated carbon", Lu Chen was directly in a beautiful mood, and after reading how to make activated carbon, Lu Chen frowned slightly, it seems that he still needs a lot of things!

But fortunately, there are no other benefits in this era, and the biggest advantage for a noble like Lu Chen is that as long as the people in Lujiazhuang give him an order, they have to give him their lives.

Lu Chen left the base, returned to reality, and at the same time brought the book out, and then began to write on paper how to make activated charcoal.

In fact, homemade activated carbon is not cumbersome, first make all the charcoal into a square centimeter or so block, and then put it in a mesh bag, and then put it into the sodium carbonate solution and boil for about 30 minutes, sodium carbonate is the name of the book, in fact, the sodium carbonate solution is alkaline water, and the alkali can be purified by directly finding alkali ore.

After doing these, clean the boiled charcoal with clean water, and then boil it with a 5% sodium carbonate solution for 30 minutes, at this time, take out the charcoal block, and then wash it three times with clean water, clean it, after these are done, you can put the bag of treated charcoal blocks outdoors to dry, and after drying, you can get a homemade version of activated carbon.

"Whew!" Lu Chen wrote out the production method of "activated carbon" in one go, and then he breathed a sigh of relief and rubbed his somewhat sore wrist.

"Dog!" Lu Chen opened the door of the study and shouted, Liu Jing, who was reading in the wing, heard Lu Chen shouting and hurriedly ran out.

"Go and call your Aya, my father has something to look for him!" Lu Chen commanded Liu Jing.

After Liu Jing answered, he turned around and went to find his father.

Lu Chen turned around and prepared to go back to the study, and then suddenly found that Feng Huai was sitting next to the study door, this guy was half a person tall, just now Lu Chen opened the door directly and called Liu Jing, and he didn't notice Feng Huai, this cold seeing such a big piece of things directly startled Lu Chen.

"I'll go!" Lu Chen glanced at Feng Huai, "Feng Huai, why are you sitting here, how cold is the ground!" Lu Chen looked at Feng Huai and said with concern.

Under normal circumstances, when Lu Chen was in the study, Liu Jing was reading and waiting in the wing, and Feng Huai was wandering around the yard, and this guy rarely had time to be idle.

It's so abnormal to sit at the door of my study today.

Feng Huai responded, and then got up.

"Something?" Lu Chen looked at Feng Huai and asked as he helped Feng Huai dust off his back.

"Nope!" Feng Huai shook his head, "Grandpa Gouwa has something important in the study, let me guard here, and I will guard by the door!" Feng Huai bared his teeth at Lu Chen and said with a smile.

"Don't do that next time! Even if you want to sit in the doorway, you have to find a stool, you know? How cool it is on the ground! Lu Chen looked at this simple guy and asked with some tears and laughter.

"Hey! I remember! Feng Huai nodded in response.

"This kid..."Lu Chen shook his head helplessly, this fool has met himself, and if he is a different person, he doesn't know how to bully this child!

Not long after, Liu Laosan went to the study under the leadership of Liu Jing.

"Third child, has there been anything going on in the workshop area lately?" Lu Chen looked at Liu Laosan and motioned for Liu Laosan to sit down, where is the current Liu Laosan still like the blacksmith of the Women's Army before, his clothes have also been upgraded from burlap clothes to coarse cloth clothes, his face is also a lot ruddy, and his figure is not too out of shape, after all, there are many things in the arsenal that still need him to do it himself

"Grandpa Xie, everything is as usual, but there are many more children from the Zhuang family who want to work in the workshop area!" After Liu Laosan thanked Lu Chen, he sat on the chair on the side. And Liu Laosan only dared to sit down with half of his ass, and reported to Lu Chen after hearing Lu Chen's question.

"Hmm!" Lu Chen nodded, "Those children who are willing to learn some crafts can ask them to help in the workshop area, of course, you must watch over them, don't let them approach dangerous places!" Lu Chen told Liu Laosan, "Also, places like the arsenal and Liulifang, don't let those half-adults go!" ”

On the one hand, the arsenal is Lu Chen's secret, Lu Chen doesn't want too many people to know, those half-grown people are not very strict, and it is always a trouble to get out of the bald; On the other hand, the glass workshop is full of fragile things, those things are broken, but it doesn't matter, at most you can do it again, in case those dishonest half-adults, take those pieces out to play, hurt others and hurt themselves, it's not a good thing.

Therefore, Lu Chen doesn't want those half-grown sons who are jumping around to go to these two places to mess around, as for the printing workshop, Lu Chen estimates that few half-adults are willing to go to that kind of boring place.

"Yes!" Liu Laosan replied again.

"By the way, also, after the New Year, drive those half-eldest sons out of the workshop area for my father, and let them all go to school! You have to tell them in advance about this, if you don't want to go to school, you won't even let him enter the workshop, you know? Lu Chen told Liu Laosan again, and Liu Laosan responded again.

"Grandpa, you seem to value those children very much?" Liu Laosan still asked his doubts, and after listening to Lu Chen's words, Liu Laosan felt that his father-in-law cared more about their children than those farmers themselves.

"Of course, these children are different from you and Bengong, they are the future of this Zhuangzi!" Lu Chen picked up the teacup and took a sip of tea, "Far no, it's just you, a hundred years later, you still have to be clothed with linen and filial piety from time to time, don't you want the dog baby to get ahead?" Lu Chen looked at Liu Laosan and asked with a smile.

"The dog baby is much better than our old man now!" Liu Laosan replied with a very honest smile.

"Now my father lets the dog baby study, so that the dog baby can be independent in the future, but I don't want to follow my father all the time!" This is the first time that Lu Chen has told Liu Laosan about his plans for Liu Jing's future.

"Grandpa, don't you want a dog?" Hearing Lu Chen's words, Liu Jing's face suddenly turned pale, and he knelt on the ground with a "poof", looking at Lu Chen and crying.

"What are you doing here!" Lu Chen was taken aback by Liu Jing's sudden attack, and then scolded Liu Jing, "How many times has my father been with you, the man has gold under his knees, but he can kneel down to the ground, what are you doing with your sudden knees, and you can't get up?" ”

"Grandpa, don't you want a dog baby?" Liu Jing didn't seem to hear Lu Chen's reprimand, and asked again with a crying voice.

"Huhao! When does my father not want you anymore! Hurry up! Lu Chen put down the teacup and glared at Liu Jing.

"Then you just now..." Liu Jing heard that Lu Chen didn't want to be himself, so he got up and muttered.

"What's wrong with my father?" Lu Chen glared at Liu Jing again, "Are you just squatting in this Lujiazhuang for the rest of your life?" My father doesn't plan to stay here for the rest of my life, and my father's fief will definitely be very big in the future, so don't you have to help me manage it! If that's the case, then Bengong really doesn't want you! Lu Chen was angry and happy by Liu Jing's appearance in that period, and glared at Liu Jing directly.

"I must study hard, and I will never disgrace my grandfather! That is, Grandpa, wherever you go in the future, I will go! Liu Jing swore solemnly.