"Don't worry, don't worry, what is the effect of the mixed fertilizer, the results of the last test need to come out, and after evaluation, it can be mass-produced and launched on the market." Mixed fertilizer is a product related to the livelihood and national fortune of the Dasong Dynasty, so Mahanshan is very cautious.

"The last trial? Isn't that going to be after the fall? "Shen Wuwan is not indistinguishable.

"Yes, yes, after the winter, there will be the final result, and if the result is as expected, the mixed fertilizer will be produced immediately, and the workshop and the artisans will already be ready." Mahanshan attaches great importance to mixed fertilizer, because it will change the grain production and population of the Dasong Dynasty, and if there is food, the population will naturally increase.

"However, I have something more powerful for you to experience now, and I promise, it will change the concept of travel for both of you." Ma Hanshan glanced at Shen Wuwan and Zhang Zi and said.

"What's the fun? Oh, there's something new to play again, it's great, quick, get it out. Shen Wuwan was a little anxious.

Since he met Ma Hanshan, Shen Wuwan knew that the business could do this.

Although, the Ruyi Warehouse is the largest warehouse in the Great Song Dynasty, and there is a semicolon in almost every larger state capital. But what he used to deal in was some very backward or traditional products, and more importantly, grain, after all, a full stomach is the most basic need. Therefore, although it is the largest warehouse in the country, in fact, there is almost nothing else except grain and cloth for the goods exchanged between the north and the south.

In fact, Shen Wuwan also wants to make the east-west flow of the north, the south, the west and the east, but because of the problem of transportation costs, often even the transportation costs cannot be earned back after the flow. Because the materials and demand in the north, south, west and east are extremely unbalanced, it is impossible to be fully loaded back and forth, so the freight has become a big problem.

If the product is not in circulation, and the silver is not in circulation, then it will not be able to generate benefits, it will not be able to stimulate productivity, and if you want to enrich the country and the people, it is simply a dream.

"Hehe, two, don't worry, eat first, and then look at ...... after eating." Mahanshan is also looking forward to the third revision of the four-wheeled carriage.

Zhang Machinery wrote that the biggest change in the third version of the four-wheeled carriage is that the shockproof system has been greatly improved. There are two aspects of improvement, one is that he finally got the "coil spring" that Ma Hanshan said, although he is not very satisfied, but it can greatly improve the shock absorption effect of the car. In the second revision of the carriage, there are only a few sheet springs for shock preparation, and the shock preparation effect is very poor. The second is that the rosin was finally refined into glue. The original wheels were made of hard wood or iron, and when the car was moving, the slightest bump in the road surface was transmitted to the car, which was very bumpy. Now it's different, now the wheels are wrapped in soft rubber, which greatly reduces the transmission of unevenness on the road surface.

According to Zhang Mechanic's letter, after the upgrade of the shock preparation system, the third version of the four-wheeled carriage has been very comfortable.

Although Ma Hanshan knew that the people of this era were far from meeting his requirements for comfort, he was still looking forward to it.

"Full, full, Brother Ma hurry up and take out the new gadgets......." Shen Wuwan and Zhang Zi were anxious to see Ma Hanshan's new products, but they didn't even drink wine, and hastily picked up half a bowl of rice and forced Ma Hanshan to come out with a new play.

"Okay, alas, it's a waste that you don't eat such a delicious dish, it's a shame to waste." Although Ma Hanshan said it was good, he still ate slowly and methodically before putting the bowl when he was full.

When Shen Wuwan and Zhang Zi saw Ma Hanshan's carriage, they were not as stunned as Ma Hanshan imagined, they didn't even show surprise, but shook their heads and sighed in disappointment.

It was also the first time for Ma Hanshan to see the third version of the four-wheeled carriage, and he squatted on the side of the carriage to carefully check the "suspension" of the rear wheel. Well, although no one in this era understands what suspension is, Ma Hanshan still named this "vibration attenuation system", that is, the anti-shock device.

The suspension system is still very rough in Mahanshan's view, the suspension composed of five sheet springs and a thick coil spring, in Mahanshan's eyes, is like the shockproof and a rotary spring of the walk-behind tractor in the previous life... In fact, the second version of the carriage suspension, that is, the walk-behind tractor "suspension".

However, although the suspension structure is simple, Ma Hanshan tried it and found that it took a lot of effort to adjust it, and the elasticity was not bad. If the hydraulic shock absorber was developed when, the suspension would be perfect. However, Ma Hanshan knows that in terms of the basic industry of this era, I am afraid that until the day of his death, Zhang Machinery will not be able to develop a hydraulic shock absorber, the simplest accessory oil seal, which cannot be solved before the rubber is found, rosin gum or eucommia gum, may be replaced, but the refining method and formula, this era should not be able to complete.

Mahanshan's eyes fell on the wheels, and it was clear that this version of the wheels had been greatly improved without trying. The multi-spoke cast iron wheels are a bit similar in style to the most common bucket wheels on the construction site of Mahanshan's previous life, this wheel is cast, not assembled with steel wire and wheel frame.

Like the wheels of the construction site bucket, the wheels of this carriage are also covered with a layer of rubber, soft rubber... Ma Hanshan touched it and knew that the so-called soft rubber in this era was actually hard rubber, which was much harder than the rubber on the bucket wheels (in fact, many bucket trucks have been changed to inflatable wheel structures, which is more labor-saving). After a closer look, Ma Hanshan found that this wheel is still different from the wheel of the bucket car, because the wheel of this carriage is covered with two layers of rubber, the outside is a harder pine resin rubber, and the inside is a real soft rubber, eucommia ulmoides rubber.

Ma Hanshan smiled after seeing it, and said secretly, this Zhang Machinery is really good, and he actually replaced the inflatable "inner tube" that could not be made with a piece of soft eucommia glue. Well, Feng Xianglin, who refined pine resin gum, is not bad, I can't imagine that he, a yellow-green doctor, still has this hand.

If according to Ma Hanshan's standards, Feng Xianglin is far from meeting the standards of doctors, because he only knows a few raw herbs, treating snakes, insects, rat bites, cold and heat sores and boils, maybe it's okay. But it is impossible to have a doctor in Wagang Village, so Ma Hanshan asked Feng Xianglin, who knew raw herbs and knew how to read, to be the "village doctor" of Wagang Village, and allocated him a place to work, and asked people to buy him a lot of medical books, and even told him a few home remedies for treating colds and flu in his memory.

This Feng Xianglin is also a smart and studious person, unexpectedly, after being a few "village doctors", he actually cured many people's diseases, of course, some minor diseases. However, even so, he was respected by the whole village. After all, in this world, not to mention doctors, there is a shortage of people who can read.

So, by the time Ma Hanshan left the village, he had been named the "President of Wagangzhai Hospital" and "Director of the Wagangzhai Health Bureau" by Ma Hanshan. "Hehe, it sounds like an official is not small, but in fact, he only has a house of dozens of square meters and two subordinates. No, he is also in charge of the "Wagang Village Environmental Sanitation Bureau", the so-called Environmental Sanitation Bureau is responsible for sweeping and cleaning the pits, and the Environmental Sanitation Bureau has several people, and these are also his "subordinates".

Ma Hanshan didn't expect that his behavior of catching mice without a cat and a dog stimulated Feng Xianglin's desire for knowledge, and this product actually began to "check things". Originally, he was going to refine medicine, but after refining a few furnaces, he was unsuccessful, and then he heard that the pine resin that the owner of the village had collected back could be used to refine rubber, and he actually studied it.

There is a saying that hard work pays off, and sometimes it is really right. I don't know what's going on, Feng Xianglin refining medicine for a while and pine resin for a while, and after refining for a few months, he actually refined a piece of something he didn't know at all, a thing that was tough, resistant, cut-resistant, and stretchable.

He didn't know what this thing was, but Zhang Machinery jumped for joy when he saw what he sent.

It's shock-absorbing, it's great, it's amazing. As long as he can absorb shocks, Zhang Machinery is happy, and he doesn't care what it's called.

However, Feng Xianglin gave this thing a name, called pine gum.

Alas, the development of society and the development of science and technology always move forward along a certain trajectory, without basic science, it is impossible to reach the sky in one step, and it is a miracle that Feng Xianglin can toss this kind of pine resin product that is not like glue. Otherwise, wouldn't the clay pot village, which already has oil, be able to step into an industrialized society in one step?

However, since this world has come to a traverser like Mahanshan, there will always be some changes, such as kerosene and kerosene series products, such as hydraulic stamping machine tools ....... Of course, a barefoot doctor invented pine gum in this world, and that was one of the effects of the traverser.

"Hehe, you don't seem to think so, isn't my carriage beautiful?" After Ma Hanshan inspected the carriage, he felt that it was very good, and he wondered why Shen Wuwan and the others were so "calm".

"Brother Ma, the four-wheeled carriage is a useless thing, put it away quickly, otherwise others will say that you are a fool." Shen Wuwan shook his head and said.

"Why?" Mahan Mountain is very strange.

"According to historical records, there were people who made four-wheeled carriages in the Qin period, but why did only two-wheeled carriages be handed down in the end? And used all the time? That's because the four-wheeled carriage is not practical at all, it can't turn at all, how can it be driven? Shen Wuwan knew that there were many people in history who made four-wheeled carriages, but in the end they all abandoned them because they couldn't be used at all.

"Haha, it turned out to be this problem, I thought it was the reason." Ma Hanshan laughed twice and jumped into the carriage, held a dead wind lamp on the lampstand, and then sat on the "driver" seat and said, "Turning is just a small problem, and the younger brother has already solved it... Shopkeeper Shen, you haven't been to the village for too long, and now all the materials in the village are transported by this kind of carriage, didn't your people report to you? ”

"Can it really turn?" Shen Wuwan seemed to have heard his subordinates mention the carriage of the tile pot village, but he didn't think so, and he didn't think about it at all.

"Of course, come up, come up, I'll take you for a lap, I can guarantee that this car will subvert your understanding of cars." Ma Hanshan beckoned.

The two-wheeled carriage of this world is not fast, the load is low, and more seriously, it is more bumpy than a double horse.