This sounds quite reasonable, at least on the surface.

With Zhang Qian's current level and Bi Gou's connections, it doesn't take much effort to find out the specific progress of a decision. So, before falling asleep last night, they sorted out the whole story.

The first person to propose that he is suitable for being the chief of the marching in Anxi Road was Cen Xi, the assistant minister of the Ministry of Personnel. The one who finally promoted and tried his best to cause this matter was Empress Wei's grandson, Dou Congyi, who had just served as the third rank of the subordinate of Tongpingzhang. The Secretary-General Yang Chen once strongly opposed it on the grounds that he "had insufficient experience and had no experience in the army." However, Xiao Zhizhong and Zong Chuke believed that the position of the chief of the marching in the position did not require command and combat. Zhang Shaojian was quick and quick, and had no contact with all parties before, which was suitable to bridge the conflict between Zhou Yiti and Guo Yuanzhen, so that the three troops could act together.

In other words, Zhang Qian, the chief marching officer, had a main task, neither to give advice to the Anxi General Manager, Niu Shizhuo, General Niu Shizhuo, nor to ensure the supply of food, grass and weapons for Zuo Xiaowei, but to be a peacemaker. He persuaded Zhou Yiti and Guo Yuanzhen to give up their past grudges for the time being, cooperate with Niu Shizhuo and act in a unified manner.

From this perspective, not only will he not encounter any risks during this trip, but it is a good opportunity to "get the qualifications". So, no wonder Niu Shizhao suspected that he took the initiative to entrust his relationship with the back door and got this job!

Moreover, the marching commander did not need to lead troops alone. If he brought more than 300 fully armed servants, Zhang Qian, the marching commander, died at the hands of the enemy, it would probably be almost the same if the Zuo Xiaowei was not completely wiped out. With the strength of Soge, it would be a dream to wipe out the Zuo Xiaowei! Unless the Zuo Xiaowei was greedy for merit and made a rash move and took the initiative to jump out of the trap carefully arranged by his opponent, and Zhou Yiti and Guo Yuanzhen would both choose to die and not save him by then!

"Although that's the case, senior brother, you have no friendship with Cen Xi, and you have only met Dou Huaizhen a few times. Why do they take care of you if it's really good?"

"The key is, senior brother, you have never been to the battlefield. You were the chief of the march when you first went on the expedition. You can't command many soldiers, but your responsibility is no less than that of the general manager!"

Guo Nu and Ren Cong did not get any comfort from Zhang Qian's words. They successively pointed out the problem.

"Cen Xi is Cen Wenben's grandson, and he is always loyal and selfless." Zhang Qian thought for a while, and then comforted him with a smile, "He recommended me, probably because my official position is not high or low, and I have never dated Zhou Yiti and Guo Yuanzhen before, so I can be unbiased in dealing with things. Before Guo Yuanzhen became the governor of Liangzhou, he had never led a day's troops!"

"Huh?" Guo Nu and Ren Cong were unable to accept this explanation, but could not refute it.

Cen Xi was extremely low-key in the past, and was deeply unfair to the reputation of being fair in the Ministry of Personnel's presidency of official evaluation. He recommended Zhang Qian as the chief of the marching in Anxi Town, which was impeccable in terms of procedures and principles. The court had no experience in civil officials in charge of military affairs, which did not start with Zhang Qian. As early as during the reign of Wu Zetian, a monk Xue Huaiyi led the army to fight. Guo Yuanzhen, the chief general of Jinshan Road, also became the governor of Liangzhou from the position of the Ministry of Rites in charge of the host and guest doctor who was in charge of the chiefs of various ethnic groups in the surrounding areas.

Nearby, there is also the chief general of Shuofang Dao Zhang Renyuan. Before serving as the Tujia Army, this person was just a censor. He also knew nothing about martial arts. However, this person quickly became the governor of Youzhou, the general of Zuotun Guard, and the chief general of Shuofang Dao! (Note: This is the official history. Zhang Renyuan changed from literary to military, and had outstanding military achievements. He was highly valued by Emperor Zhongzong of Tang.)

"If the emperor wants to kill me, it doesn't have to be so much Zhou Zhang!" Seeing that the uneasy expressions on the two of them could not dissipate, Zhang Qian smiled and continued to add, "As for others, since they cannot escape, we can make things beneficial to us, regardless of whether their original intention is good or malicious!"

This was the conclusion he came to after careful consideration. When Guo Nu and Ren Cong heard this, their eyes immediately lit up.

No matter how capable Zhang Qian is, it is probably an imperial edict to kill him. Therefore, from the perspective of the Dragon Emperor Li Xian himself, he must have never thought of killing him. At most, he believed in slander and was dissatisfied with him and wanted to hit him. Then, this time the court arranged for him to be the marching supervisor of Anxi Town, and he retreated to the level of fighting with his enemies. In other words, it can be regarded as another move by a certain enemy.

Moreover, no matter which enemy's move was made, this time they only dared to follow the rules of the court and did not dare to openly collude with bandits and shout for killing. Compared to the previous few times, their arrogance was already three points lower.

"I originally planned to explain some things to you in a few days. Since you both are here today, let's just change them today." Knowing that if Guo Nu and Ren Cong find enough things to do, the two of them will inevitably want to accompany him to go on a war. Zhang Qian thought about it, and turned around and took out two more manuscripts from the desk.

"You two have different tasks, but you can exchange them and give each other advice!" After looking at the two junior brothers, he handed the manuscripts into their hands and continued to add with a smile, "The third junior brother's book is mainly my idea of ​​the application of water wheels. It mainly involves some basic principles of physics, so the theory is not difficult to explain. The difficult thing is how to achieve it. Especially hydraulic drilling, boring, and the sketch I drew is only calculated as a schematic, and the specific details need you to bring the craftsman to explore little by little. If you can successfully explore, we can use the kind of musket in my hand to make it with iron, and it is not a problem to build one or two hundred pieces a day."

"Yes!" Ren Cong's eyes lit up when he heard this, and he decided to focus his head.

"But what we are most anxious about now is not drilling machines and boring machines, but this one." Zhang Qian smiled and took the manuscript back from him, turned the first few pages, pointed to a very simple sketch and whispered, "I call it screws, bolts and nuts. Some bronze ware in the East City have long had threaded knobs, which is the same as this principle. However, the one made very small and the material is relatively soft. The screw I want needs to be made of iron, the smallest thickness is only half a minute, and the largest thickness is one foot!" (Note: Archaeology, bronze ware in the Tang Dynasty had bolts.)

"Ah——" Ren Cong was stunned and exclaimed involuntarily. Threads were no longer uncommon in the Tang Dynasty. Some finely crafted copper and silver jewelry were often fixed with fine bolts. However, screws as thick as one foot were exceeded his cognitive limit.

"Threads have many uses, not just for bolts and nuts." Zhang Qian glared at him, quickly turned back a few pages, and almost at the end, he pointed to a very ugly and complex sketch and added in a low voice, "This, I call it a forging machine. Use gears to slow down and slowly rotate the mold above, so that it passes through the screw and moves closer to the mold below. In this way, the metal plate sandwiched between the two molds will be squeezed out any shape and pattern we need."

"I understand. If this method is used, the set of dragon armor on the emperor can press out the patterns in a quarter of an hour, and there is no need for the craftsmen to engrave them on for five or six days day and night!" Ren Cong immediately realized and responded with a red face.

"Smart!" If Zhang Qian had not traveled through time, he would have been a qualified teacher. After hearing Ren Cong's words, he immediately smiled and gave a thumbs up, "But the function I hope you can achieve is this."

He quickly turned backwards and almost turned the manuscript to the bottom, then pointed to a round cake with beautiful patterns on it and small serrated patterns around it, and said with a smile, "Pressing gold cakes and silver cakes are about half a tael of about one tael. Gold does not contain pure gold, 20% copper, and silver does not contain pure silver, 10% and 10% and 20% tin. In this way, a gold cake can be just folded into ten silver cakes. In the future, the merchants can use gold cakes and silver cakes to settle internally, and there is no need to carry a large amount of copper coins."

"This..., senior brother, don't worry, I will work hard." Ren Cong's brain was no longer enough, he blinked his eyes and nodded repeatedly.

"Senior Brother, what if outsiders want to use our silver cake?" Guo Nu was older than Ren Cong and had more experience than Ren Cong, so he immediately asked in a low voice.

"I'll talk about it when your third junior brother can press out the silver cake!" Zhang Qian glanced at him and whispered, "Don't think so long. The reason I chose to squeeze molding is because doing so can reduce the fire consumption generated during casting."

Seeing Guo Nu's strong desire for knowledge, he hesitated for a moment, and he whispered, "It is illegal to cast money privately, we can't do it. But if outsiders want to use our silver cake, they can sell him one of the five hundred-ciete Kaiyuan Tongbao. Then they can be recycled in various places. As long as the sawtooth around the silver cake has not been smoothed, they can be recycled at the original price. If someone goes far away to do business, they can also exchange gold cakes at this price, and then find our Liushen Commercial Bank's semicolon in another place and exchange it back at the original price. But these are very distant things. Whether it can work depends on the development of our Liushen Commercial Bank, and the three of us, can we cover the future!"

"Senior brother, don't worry, you can definitely!" Guo Nu put away his smile, grabbed his hands alternately, and clanged his fingers.

"I understand, senior brother, don't worry! I won't eat, and I will get this out!" Although Ren Cong's reaction was slow, he was able to think carefully. The more he thought about it, the more he was full of energy he was.

The eldest brother is right. Indeed, if you want to help the eldest brother, you don’t have to go to the battlefield. If you have this skill, you will probably have to distract your elder brother from taking care of him. If you can follow the eldest brother’s instructions and make the screw, bolt, nut and forging machine as soon as possible, it is equivalent to stabbing a knife directly into the heart of Baima Sect.

The reason why the White Horse Sect dared to stir up trouble in the Tang Dynasty but always stood firm is because they were able to make money and lend money, deposit and withdraw money from other places. No matter how high the monk's reputation is, it is not as high as the real gold cake. If the gold cake and silver cake can be exchanged in other places, half of the people who go around the world to do business in the future will choose to carry gold cake and silver cake instead of the three-inch wide note given by the monk!

When the White Horse Sect’s money-making and lending business was unsustainable, this sect that was full of evil was naturally collapsed. It was impossible to change its name and be reborn on the spot!

"You have to eat the rice in one bite. Make nuts, bolts and screws first, and then forge presses." Zhang Qian nodded angrily to Ren Cong and whispered, "Don't be too anxious. You are less than 20, and your second brother and I are only in our early twenties. And our opponents are all old!"

"Yes!" Ren Cong seemed to understand but nodded hard again.

He reached out and patted his shoulder, and Zhang Qian turned his gaze to Guo Nu, who looked expectant, "The things in your hand are more complicated than those of junior brothers, and even a little dangerous, so you must be careful."

"Senior Brother, don't be afraid, I'm smart!" Guo Nu had been so itchy that he couldn't scratch his teeth, and immediately promised loudly. "I found that something was wrong, I ran away."

"Yes, life-saving first, you can give up everything else!" Zhang Qian admired Guo Nu's cleverness and nodded with a smile, "I have reorganized the method of refining rose essential oil. Whether it can be realized depends on you. In addition, when I was not in Chang'an, you need to find something called green alum oil. The Taoist priest who refined the alchemy uses the method of calcining stone gallbladder to make green alum oil. I need you to try it, whether it can be made by yourself. This thing cannot be touched by people, or if it is touched, it will burn muscles and cause lifelong disability. At worst, it will be fatal. Therefore, you cannot be too careful no matter how you are!"

"I understand, senior brother, I'll watch from the side and instruct the dead soldiers to do it!" Guo Nu immediately had an idea and agreed loudly from the side.

If it were normal, Zhang Qian would have to teach him a lesson. But today, Zhang Qian just sighed softly. Then, he took out the manuscript from Guo Nu's hand and flipped it quickly, "The green alum oil is called sulfuric acid in our teacher's sect. After it is prepared, you dilute it with distilled water and put it in saltpeter, and you will see that the saltpeter dissolves. When saltpeter no longer dissolves, what you get is nitric acid, and if the saltpeter is added, the final result is hydrochloric acid. These three acids can be stored in glassware. When I was not in Chang'an, you try to understand the manufacturing process and then make two or three hundred kilograms each."

"Just do these?" Guo Nu felt that his task was much easier than Ren Cong, and frowned and protested in a low voice. "Senior Brother, I can..."

"The rest are some less important things. Take time to do it and see if you can make money." Zhang Qian smiled and continued to flip the manuscript. "For example, if you calcin the lime sand together, you can get cement. Cement and sand and cold water are mixed together to make mud. After solidification, it is almost as hard as a stone. It is not a problem to use bridges and houses to build a house for hundreds of years. Also, use saltpeter and copper basins to make ice. In addition to the three acids, the other things mentioned in the manuscript can be transferred to the two of your names after you have successfully made it. Just let them pay the patent fee in the original way."

"Hey, hey!" Guo Nu immediately smiled and nodded repeatedly.

"The things you made can also be passed on to the Ren family, Guo family, and workshops under the Liushen Commercial Bank. As well, just ask them to pay the patent fee!" Zhang Qian never favored one and the other, and immediately gave instructions to Ren Cong again.

"Don't worry, senior brother, I won't lose any money I should collect!" Ren Cong had known for a long time that when the senior brother got rich, he would never leave the Ren family and Guo family, and he also promised with a smile.

"Then go out and do things quickly!" Zhang Qian also experienced enough of being a teacher and drove his two junior brothers out of the study with a smile.

"Hey, hey!" Guo Nu and Ren Cong were finally able to help their senior brother. They were satisfied and agreed to leave. The door of the study was gently closed, Zhang Qian took a few sips with a cup of water, and then sighed softly at the rolling clouds outside the window.

In fact, the situation behind the scenes of this expedition is much more complicated than that of him, Guo Nu and Ren Cong.

Maybe he really never returns this time. However, he kept a complete set of original industrial materials and chemical triacid manufacturing methods. Even if he really couldn't come back, the Anshi Rebellion would not have a chance to happen!

He did this not to repay Li Xian's kindness for his kindness, but to the Tang Dynasty. He was the strong, prosperous and everyone in the world yearned for the Tang Dynasty in his dream in the 21st century.

The dark clouds dissipated silently, and the sun shone on his young face, and the loneliness was clearly visible.
Chapter completed!