"Alum?" Su Hao looked at Chen Guanyu strangely, "What is the green alum?" ”

"Green alum...... It's alum. Chen Guanyu didn't know how to explain, "This thing can be used to prepare alum oil, which is like water and can burn hands, and we and other Taoists often use it to melt minerals to prepare elixir." There is also the gentleman on the beam, who melts the stone walls of others with this object to break into the house and steal it......"

"What do you mean...... It can't be sulfuric acid, right? Su Hao's mind flashed, and he thought of what Chen Guanyu was talking about. In fact, the name of sulfuric acid in ancient times was called alum oil, but this kind of thing is rarely used by the people, so Su Hao has not heard of it.

Chen Guanyu was accustomed to all kinds of fresh words Su Hao said, he thought about it in his mind and replied, "Sulfuric acid? Well, this thing is indeed refined from sulfur, and this ore in the master's hand, if it is not used for alchemy, it can be used to refine alum. ”

"That's right, that's right, Lao Chen is really knowledgeable." Su Hao patted Chen Guanyu's shoulder with a smile and said. This mineral is called pyrite, and the main component is iron sulfide. Su Hao originally thought that this ore could be used to smelt iron, but after hearing Chen Guanyu's words, he remembered that this ore could also be used to refine sulfuric acid. In fact, it's not that he is forgetful, it's that he can't imagine that the ancients actually knew about sulfuric acid.

"Lao Chen, this refining sulfuric acid ...... Or is it the method of alum oil, do you know? Su Hao asked.

Chen Guanyu slapped his chest loudly: "Master, this is a question, the old way I Qimen Dunjia, the five elements gossip, proficient in everything, this method of refining green alum is a beginner's Taoist child, and my old Taoist has nothing to say." ”

Hearing Chen Guanyu brag, Yu Fuyang laughed: "Old Chen Dao, in front of Master Su, don't brag, it's not enough to be embarrassed?" Your age is older than Master Su, what will you do if you look at Master Su, what will you do? ”

Chen Guanyu was exposed by Yu Fuyang, but he was not annoyed. Instead, he said forcefully: "Old Dao, when did I say that I didn't accept Master Su?" Master Su is a Wenqu star, how can he be compared to a mortal like me? But this method of refining green alum, I am indeed proficient in the old way, if the master does not believe it, I will go back and refine a bottle for the master to see. ”

"Uh-huh. I never said I didn't believe it. Su Hao said. He knew that many of the Taoist priests back then had learned alchemy. And many chemical inventions in ancient China were done by alchemists. The method of extracting sulfuric acid from pyrite is not very complicated, and Chen Guanyu said that he can do it, which should be somewhat credible. Compared with. Although he himself is familiar with the process of this set of chemical reactions, he really does not know how to use ancient instruments to complete this reaction process.

"Lao Chen, if you are sure, I really want to ask you to help refine some green alum oil. This thing is very useful. However, when you are refining, you must be very careful, this thing splashing on your body is not just a matter of burning your hands, but will hurt people. ”

Su Hao couldn't think of what could be done with sulfuric acid for a while, but as a later science and engineering expert, he knew the importance of sulfuric acid too well. Now let Chen Guanyu find a way to refine some sulfuric acid, maybe when it will be used.

"Lao Dao understands. Master, don't worry. Chen Guanyu swore that although he is now the bookkeeper of the commercial bank and has helped Su Hao a lot, after all, he is not using his own profession to do things, which has always made him have some regrets. Now I heard that Su Hao was going to entrust him to refine sulfuric acid. Being able to give full play to his alchemy expertise, he only felt that his whole body was full of strength, and he couldn't wait to immediately carry these ores back to the city and go to the closed door alchemy of the Ximen Qingdu Temple where he lived.

Su Hao instructed Yu Fuyang to take people to pile the chiseled rocks back. He made some simple disguises, and then returned to the city with a few loads of ore. This kind of mine can't run anyway. Even if it is discovered by the surrounding villagers, they will not be able to carry out large-scale mining, so there is no need to send people to guard here.

Back in the city, Su Hao asked Chen Guanyu to go back to the Taoist Temple first, and at the same time asked someone to send a load of ore to Qingduguan for Chen Guanyu to refine sulfuric acid. He himself picked a few pieces of ore with the most gold grains, carried them in a cloth bag, and came to the county office.

"Changed it back?" Han Wen sat in the lobby to greet Su Hao, and as soon as they met, he asked eagerly: "What is the effect of this trip to Dashun Township?" ”

Su Hao bowed and said: "Congratulations to the county honor, the student has just returned from Dashun Township, and he is fortunate to live up to his mission." ”

"Did you really find a gold mine?" Han Wen was overjoyed and almost ran from behind the public case.

Su Hao stepped forward, put the cloth pocket on the case in front of Han Wen, and said, "Lord County, please take a look." ”

Han Wen opened the cloth bag, took out a piece of pyrite, and looked at it carefully. The gold particles embedded in the ore shimmer with brilliance. Even if Han Wen does not know mineralogy, at least he is no stranger to gold, and he knows that only pure gold grains can have such color and luster.

"What is the scale of this mine?" After Han Wenxian looked at the ore, he asked Su Hao.

Su Hao said: "The student roughly estimated that the ore that can be mined in this mine should be refined into 10,000 taels of gold. ”

"Haha! I, Fengcheng Limin, have been saved! Han Wen patted the case and laughed wildly, without the slightest hint of his former reserve.

Since Chang Wu appeared with Jin Yiwei, Han Wen had a big stone in his heart, and he didn't know how to raise the 2,000 taels of gold that Chang Wu asked for. It's good now, Su Hao really found a gold mine in Fengcheng, as for how to open the mine, that's a matter for Chang Wu to figure out a way. As long as Han Wen hands over this gold mine to Chang Wu, he will have no reason to blackmail, right?

A stone fell to the ground, Han Wen only felt relaxed, he stood up, and said loudly: "Come on, this county has to change clothes and go to the mansion to meet Chang Gonggong to present this ore." ”

Han Wen wanted to see Chang Wu, and Su Hao naturally had to follow, otherwise once Chang Wu asked about the situation around the mine, no one would be able to answer.

Because Su Hao was out prospecting, he changed into an ordinary short coat and did not wear a student's shirt. He had the heart to say that he would go home to change his clothes and come back, but he was stopped by Han Wen: "Change, you wear this dress to see Chang Gonggong, and it can also show that you have worked tirelessly, right?" ”

"Uh, okay." Su Hao nodded, this show has been the same throughout the ages, and Korean is not exempt from vulgarity.

Su Hao carried the bag of ore, went out with Han Wen, and went to the mansion where Chang Wu lived. There was not much road between the county government and the mansion, so Han Wen didn't take a sedan chair, but just walked with Su Hao, and asked some things about the prospecting process along the way, so that he could talk to Chang Wu for a while.

When I came to the door of the mansion, I saw two county officials standing outside the gate, who were sent by Wang Qi to guard the door for Chang Wu. As for the two brocade guards who came with Chang Wu, it was just a matter of coming out occasionally to pretend to be a façade, and let them watch the door, they would definitely not do it.

"Lord Han!"

Seeing Han Wen coming, the two officials hurriedly stepped forward to salute. Han Wen waved his hand, signaling that they didn't have to be polite, and then asked, "Is Grandpa Chang in the mansion?" ”

"Here, Wang Xiancheng is accompanying Chang Gonggong and the two military masters of Jinyi Wei to listen to the play and watch the tea light." The official replied.

"Then you can tell me about it." Han said.

For Hangeul, this is also a helpless thing. The eunuch represents the emperor, and his small seven-rank county order is not enough for people to stuff their teeth, so he can only grovel and ask to see him as a subordinate. Scholars have always looked down on eunuchs, but in front of eunuchs, they can't show this disdain, which should be a very painful thing.

The official went in and made a report, and then ran out and brought Han Wen and Su Hao into the courtyard. The mansion in Fengcheng County is not small, divided into several small courtyards, and in the middle is a large courtyard, which belongs to the place where activities are held. When Han Wen and Su Hao entered, they saw a stage set up at one end of the courtyard, and there were some artists performing tea lights on the stage.

"Fengcheng Zhixian Hangul, meet Grandpa Chang!" Han Wen stepped forward and knelt down to greet Chang Wu.

Su Hao hesitated for a moment, then knelt down obediently and said, "Student Su Hao, meet Grandpa Chang." ”

Chang Wu smiled, waved his hand, and said, "Get up, it's all your own people, you don't have to be polite." Xiaoliang, give Han Zhixian a seat. ”

A little eunuch standing on the side agreed, and made a gesture of preparing to come over and move a chair for Han Wen, but his feet did not move. Su Hao stepped forward and said, "How dare you work on the little father-in-law's big drive." ”

As he spoke, a piece of silver weighing two handfuls had already been handed over, and the little eunuch skillfully took the silver and smiled at Su Hao. Only then did Su Hao retreat, moved a chair for Han Wenlai from the side, let Han Wen sit down, and stood beside Han Wen, because he heard that Chang Wu had only ordered Han Wen to take a seat, but he did not say that he would give him, a student in a short shirt, a seat.

Chang Wu looked at Su Hao's actions and asked Han Wen: "Han Zhixian, who is this little descendant?" What did you say when you brought him to our house? ”

Han Wen arched his hand and said: "Father-in-law Chang, this is a student of our Fengcheng Longguang Academy, named Su Hao. He is familiar with some techniques of public opinion, and his father-in-law ordered him to explore and mine gold in this county, and it was this Su Hao who took the initiative to ask for help, and trekked through mountains and rivers to Dashun Township in the southeast of the county to explore a gold mine. He hurried for two days, and without bothering to change his clothes, he rushed to report the good news to Chang Gonggong, and asked Chang Gonggong to forgive him for the crime of misconduct. ”

"Really?" Chang Wu was stunned for a moment, "Han Zhixian, you mean, you really found a gold mine?" ”

The actors who staged the tea light on stage had already received Wang Qi's hint and stopped performing. Su Hao smiled at Chang Wu and said, "Thanks to Chang's father-in-law, the student has indeed found a gold mine, and there are three pieces of gold ore mined, please take a look at it." ”

After that, he handed the cloth bag he was holding in his hand to Chang Wu.