All kinds of technical thresholds are like a series of difficult to climb mountain beams in front of Deng Shifeng and his students, for these technical obstacles, Deng Shifeng is not worried and not afraid, his biggest advantage is that he can have a certain amount of time to lead students to overcome these technical difficulties, and not like those protagonists in the novel, either fighting with various officials, or busy picking up girls, although this is not interesting, but it can make him more focused on cultivating students' reserve strength and research and doing things.

On the twenty-fifth day of the first month, after an interval of more than a month, Huang Zhangshi took people and goods, and appeared at the foot of the mountain agreed in advance for the second time, unlike the last time when there were more than a dozen horses, this time the whole caravan came to as many as 30 people and more than 50 batches of horses.

"Ertouren, your manifest is hard for my brother to find......"

Since the two sides had already had a successful transaction, after confirming the identity, Huang Zhangshi came directly to Deng Shifeng, and began to vomit bitterness while clasping his fists and saluting. It is said that this kind of behavior is either very rude or the relationship between the two parties is already extremely familiar, and the relationship between the two parties is definitely not good to the next step, so Huang Zhangshi's move suddenly made Qin Er's faces change slightly.

"Hehe, there is a yellow palm matter, brother, I am not very good at yellow and white things, but I am quite interested in these strange products of the world, if it is not too many trivial things in the mountains, brother I will definitely be willing to wander around in person, only the hard yellow palm work for my brother I bothered to do it for me......"

Compared with Qin Er, Deng Shifeng didn't care too much about these rituals, although many people are not to blame, but the difference in ancient class identity, especially some of the cumbersome rituals that those sour and rotten people adhered to, are really annoying. And for Huang Zhangshi's complaints, Deng Shifeng naturally knew that the other party wanted to use this form to get closer to the relationship between the two parties verbally, and the various things he asked the other party to find may be nothing from the list, but when it is really implemented, the number and variety are so detailed, it can indeed make the other party scratch their brains and go crazy. And because they have clearly needed these things to trade, this makes them even more entangled, and they have never seen a master in the world who doesn't like to trade with real money, but here, there is really a special one!!

Seeing that Deng Shifeng did not change color because of his faux pas, Huang Zhangshi naturally climbed up the pole and spat to Deng Shifeng about how difficult it was to find the various items on the list, while unloading the various goods carried by the horse for Deng Shifeng to inspect.

While accompanying Huang Zhangshi to listen to him spit bitter water, while inspecting the various goods carried, Deng Shifeng only had a faint smile during the whole process, and maintained this smile when he saw any goods that were pulled over, so that Huang Zhangshi on the side could not decipher any information from his expression which item was more important, which made Huang Zhangshi constantly sigh in his heart - did this young two-headed man really grow up in the mountains? The old man is three points better than himself......

It's not unreasonable for Huang Zhangshi to slander like this, if you want to say that there is a roughly stable price in the market for things like copper, lead, tin, water and mercury on the list, it's okay to say, but because many of the various items that Deng Shifeng asked him to find are things that no one looked at in the past, this makes it quite difficult to estimate the price; For example, like the ten bags of filtered white sand, these things are not worth a few dollars at all when they are placed outside, and the cost of animal power and manpower is many times higher than it when pulled in, but the other party still asks for this thing by name. There were also those strange stones and other things that Deng Shifeng let himself find...... Is this thing worth anything? Therefore, Huang Zhangshi can only hope that when Deng Shifeng checks these goods, his expression can change, so that he can know what he likes more from the other party's emotional changes......

Huang Zhangshi's mind Deng Shifeng is naturally quite clear, although he has not been through business, but he has businessmen and salesmen who are good at this in his mind, and observing words and emotions is the specialty of these people, so in order not to expose the actual value of these items early and affect future shipments, Deng Shifeng has been quietly looking at the bags of various "treasures" in front of him that make his heart beat wildly.

Huang Zhangshi is very practical and diligent, otherwise he would not have become the sole manager of his own business house Liuzhou Mansion at the age of thirty-five, and he brought hundreds of bags of various items, such as copper, tin, lead, mercury, not to mention, and those white sand are selected quartz sand that has been screened and washed according to his own explanation, and can be processed directly without even selecting materials when transported back to the mountains...... And what made Deng Shifeng's heart beat the most was that the other party really found the manganese ore that he needed the most at present.

Manganese ore its biggest role is in the iron and steel industry as a deoxidizer and desulfurizer, especially for the manufacture of alloys, it is an extremely important fusion agent in the fusion of various elements, exaggerated to describe that there is no manganese then there is no alloy, even the production of glass and ceramics can also play the role of colorant and fading agent, can be said to be a very important industrial raw material in modern industry. For Deng Shifeng, with manganese ore, the quality of his steel will be greatly improved, and with alloy steel, it means that better barrels can be provided for future batch use.

Quietly asked Huang Zhangshi how to find these manganese ores, Huang Zhangshi slapped his thigh and praised Deng Shifeng for the accuracy of the information provided. Huang Zhangshi can find it accurately so quickly and without even seeing manganese ore, and his biggest hero is Deng Shifeng, because Deng Shifeng has already told the other party the approximate origin of this gray and black stone in the last conversation - east of Liuzhou City, east bank of Liujiang River, west of Guting Mountain all the way to the riverside, there are these black and gray stones in a place called Liuza! Huang Zhangshi has been in Liuzhou for nearly ten years, and there are local employees who have worked for almost a lifetime......

Of course, in addition to Deng Shifeng's ability to remember this manganese mine called Liuzao in later generations, there is also one of the biggest help is Guangxi's own mineral advantages. As mentioned earlier, Guangxi's minerals are not abundant, but there are several things that occupy the first or foremost in the country, and manganese ore is the first with nearly forty percent of the country's reserves. In the memory of the salesman who loves to read time-traveling novels in Deng Shifeng's mind, in many novels, the technical time-travelers do not want to make better steel or even alloy steel, but they can only regret it because there is no manganese ore, and it may not be easy to say if it is replaced by other provinces, but it is ...... in Guangxi In the early 90s of the 20 th century, when the craziest time was, there were more than 700 manganese mining points in Guangxi, covering almost the entire county of Guangxi, and it can be said that basically all counties have large and small state-owned, private, and even illegal mining sites, and with the integration of management, it has dropped to more than 100 large and medium-sized mining sites in the new century.

In addition to manganese ore, Huang Zhangshi also found a number of other materials that Deng Shifeng needed according to the details provided on Deng Shifeng's list, but in addition to these things, it may not be possible to accurately understand what Deng Shifeng wants. It's just that although Huang Zhangshi has worked hard to find what Deng Shifeng wants on the list, there are still more minerals and materials that have not appeared on the scene.

Deng Shifeng was not surprised that there was no shortage of materials that could be found, even in later generations, not many people could fully recognize the things listed on the list, let alone the current era when technology was still backward. But despite this, the materials that Huang Zhangshi could find were enough to make Deng Shifeng's heart beat wildly and surprise.

Holding back the emotions in his heart, Deng Shifeng asked Qin Er to show the other party the trading products this time.

The products of this transaction are still mainly knives, but compared with the last batch of straight-handled survival knives that did not look good, the survival knives of this transaction are not in a hurry, and their shape and decoration are much better than the last batch.

In addition to the straight-handled survival knife, folding knives and switchblades were also extended; Although the folding knife is not as strong as the straight knife because of the active connection between the blade and the handle, its size is much shorter than that of the straight handle knife because it can be folded and retracted, which is more convenient to carry out or even hidden. The switchblade is an accessory in the process of firearms research, because both flintlock pistols and rear-loading guns need different springs, Deng Shifeng and the old grandchildren made a simple spring and coil spring through heat treatment, and after getting these two things, Luo Dan suddenly said that it would be more fun to be able to install the knife head and let it retract like the teacher's telescopic pen...... A simple sentence made the old grandson's son shine, and he tinkered with the ironworks and at home for several days, and finally got him a relatively simple straight switchblade. Seeing the original version of the switchblade made by the old grandson's son, Deng Shifeng couldn't help but sigh at the ability of the ancient craftsmen to draw inferences from one another, and after making certain improvements to its knife body and blade to ensure the smooth and stable knife entry and exit, this very gimmicky little thing has become another new product of the iron factory.

Seeing three different knives and ten good quality long knives, Huang Zhangshi and the people who came with him liked these little things very much, not that the long knives were bad, but that the quality of these long knives was too good, even if the guards wanted to make them their own...... But the high price still makes them settle for these knives in favor of them. Especially the switchblade, a snap after pressing the lock button will pop out of the bright and swaying blade, the various formations of the guards have been seen, they know very well that there are not many opportunities to really open the film, and when they encounter things, they want to shock the other party and dare not do it, in addition to the long knife, in some special occasions, this more portable switchblade can bluff many people just because of that momentum.

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