We must help Zhang Fei advance water and land, and repel Gan Ning's waterway blockade, so as to cut off Zhang Lu's troops in the narrow valley terrain, so that the head and tail cannot be taken care of each other...

What should I open and hang it?

Faced with this problem, Li Su also passed all the gadgets he had fiddled with in the past half month after taking him off Nan Zheng.

After taking Nanzheng for more than 20 days, Li Su was a little busy with official duties every day.

In addition to focusing on fighting against the pyramid scheme, preparing educational lottery, eating, drinking and taking baths, he also listed himself as a liberal arts student, and at this stage he could make small checklists in terms of technology and technology.

At that time, the first thing Li Su thought of was to create stirrups with two sides, metal pedals, and saddles with wooden lining saddle bridges (the current saddle is soft, just a leather product is laid on the horse's back).

These two things can improve the stability of the cavalry**** Use weapons with both hands, and also allow ordinary cavalrymen to sprint with their cavalry to avoid being pushed off the horse by the reaction force.

However, after thinking later, I think that this year, I will mainly fight Zhang Lu, and next year, I will probably compete with Liu Yan first. There is no room for cavalry to perform a large-scale charge, so this thing can be temporarily suspended.

So Li Su just secretly created a few samples to make it more comfortable for him to ride a horse by himself. He used it first and did not rush to promote it.

In addition to the double-sided stirrups, the second hang that Li Su thought of was the gunpowder that was used in later generations. He actually found someone to get several raw materials of gunpowder, saltpeter, sulfur, and charcoal. However, after initial troubleshooting, he could only "isolate oxygen and burn", but there was no blasting force at all.

Li Su estimated that with his half-baked liberal arts student and his experimental science level in this era, he would not see the emergence of field gunpowder weapons during his lifetime.

(Note: The protagonist doesn't understand liberal arts students, so don't expect guns and cannons in this book, even earth cannons, and there are not even stone throwers to throw away the flower bullets. Otherwise, it wouldn't be a trick, and this is not a reverse gold finger, which I think is very reasonable.)

Although gunpowder weapons cannot be made, the idea of ​​gunpowder should still be spent - it cannot be used on the battlefield. It is also beneficial to the country and the people when building water conservancy projects and mining. In that case, you can slowly design and calculate them carefully, slowly dig holes and holes to construct. Maybe the early black gunpowder with a slightly smaller expansion rate is still a bit useful.

The reason why Li Su was so persistent was related to something that his assistant Zhuge Jin reported to him one day after he entered Nanzheng:

Before, when I left Chencang and walked through the Qinling Road, didn’t Li Su sigh at the feeling of “Why is the stream flowing from the northern foot of the Qinling Mountains to Chencang so shallow, with only a few months of rivers”? I want to verify the local transportation environment and the possibility of transformation? (I don’t remember going back to Chapter V Chapter 73, “I didn’t expect you to be like this”)

It would be fine if he mentioned it like Li Su at that time. But in a word, his subordinates ran away. During these days, after Zhuge Jin was free, he helped search information everywhere. His younger brother Zhuge Liang liked to travel around and took soldiers to the scene to help Li Su dig rock samples, and by the way, he learned from Li Su how he read stones and understood Feng Shui.

As a result, Zhuge Jin's efforts didn't matter, and he really made a very valuable and major discovery for Li Su.

That was about half a month ago, when Zhuge Jin excitedly took the "impact shale" sample obtained by his younger brother and a book called "Book of the Later Han Dynasty" and came to Li Su to find him to make contributions.

"Zhonglang! Look at what I found! The northern section of Chencang Road has been able to transport water since ancient times, and there are rivers all year round! No wonder our army was so difficult to walk on the road when entering Sichuan, and it was difficult to transport grain and fodder, but Han Xin could easily travel to Chencang in secret back then!

It turned out that at the end of the Qin Dynasty, the Western Han River flowed northward into the Wei River and finally merged into the Yellow River! Instead of flowing southward into the Jialing River like now, and finally merged into the Yangtze River! It was after Emperor Gaozu's death, and Empress Lü claimed that in those years, because of the Wudu County earthquake, the Qinling Mountains collapsed and the river was destroyed, and the Western Han River flowed southward into the Jialing River from then on!

You see, I found the original text for you from the Book of Han. This is the original text of Ban Zhaoxiu's annotation of "Gaohouji": Empress Gao Lu, and Emperor Hui... in the first month of the first year, the imperial edict said: "......' in the spring of the second year, the imperial edict said: "......'. The memorial is reported. In the first month of spring, the earthquake occurred, the Qiang Dao, and the Wudu Dao collapsed. In the sixth month of summer, the sun was eclipsed. In the seventh month of autumn, the king of Hengshan did not doubt his death. He traveled to Bazhu coins."

The format of the Chinese scriptures, each paragraph is a decree issued at the beginning of a certain year, and then ends with "report", indicating that the emperor/empress dowager was approved by the emperor and the empress dowager, followed by major disasters or auspiciousnesses in the year.

The "Yimao in the first month of spring, the earthquake, the Qiang Dao, and the Wudu Dao mountain collapse" that Zhuge Jin read was closely behind "Zou Ke", which shows that it was a very serious disaster that year.

Zhuge Jin also helped Li Su check the date very sensible. Converted to the "Yimao of the first month of spring" on January 27th in the second year of Empress Lu (186 BC).

Li Su got the important clue that Zhuge Jin inquired at that time, and became increasingly determined to "even if he can't make gunpowder weapons in his life, he still needs to use gunpowder for engineering."

Since the Western Han Dynasty water did not flow to Chencang, it was because of a "lands collapse", that is, the rocks on both sides collapsed to block the valley, rather than the entire mountain being lifted, it is possible that such rivers could be rescued through dredging. (If the entire mountain being lifted, it would not be saved. I don’t know how deep the hard rocks would be dug)

Of course, perhaps it would not be that difficult for Liu Bei to leave Chen Cang again in this life. He had already tampered with Chen Cang City's city defense before, and he could fight without a long-term war of attrition, so there was no need to continue transporting grain through Chen Cang Road to the north.

But Li Su wanted to waste money on this project, and of course there were other shocking and vicious plots to create gods. There is no need to elaborate on the specific details behind it. In short, Li Su has decided on the farming technology of "using gunpowder for engineering blasting". It is just a matter of time.

However, although gunpowder cannot be used as a field weapon, Li Su was still open and encouraged when he asked the craftsmen to tinker with, allowing them to use their imagination to make any burning and toxic smoke equipment research and development and promotion.

In addition, Zhuge Jin was highly praised by Li Su for his gains in studying the "Book of Han". The young man was very impressed and studied hard every day, and he actually helped Li Su find some useful gadgets.

It was about a week after Zhuge Jin reported on "Han Shu. Gao Hou Ji". When he learned that Li Su was thinking about how to make tricks and tricks to build water conservancy, Zhuge Jin came with "Records of the Grand Historian" and "Book of Han".

"Zhonglang, "Records of the Grand Historian" records that Li Bing used fire to repair the Dujiangyan and burned the rock walls with fire and poured cold water to cause the rocks on the river bank to collapsing and breaking alternately. I don't think you can get the medicine you said, "It is okay to use the burning method."

In the "Han Shu. Geography", I saw that "there is flammable water in Gaonu County, which was born in Shangjun during the Han Dynasty, and now it is considered a Beidi County. I also asked the business travelers from Chen Cang that there are indeed such rare goods that can be sold, with a small output and a little expensive, but there are few people in the world who buy it. I took the money you gave and asked the merchants of Yongliang who bought some. Do you see if it is useful? Can it be used to burn the mountain stones like Li Bing when he was working on water conservancy?"

Shangjun or Beidi County is located in the Hetao area. It no longer belongs to the jurisdiction of the thirteen Han prefectures at the end of the Han Dynasty. That place is north of Yongzhou, equivalent to the later Shaanxi. Now the administrative division is "five counties of the Xiongnu". In fact, after the Qiangqu Shanyu was killed, the three counties in the east were occupied by the pseudo Shanyu Xubu Guduhou, while the two counties in the west, including Beidi County, were under the hands of the Qianghu people.

Specifically for Gaonu County, it is west of Yulin and east of Yinchuan in later generations, which is equivalent to the Mu Us Desert area.

But no matter what, the Hu people also had to do business with the Han people. The supplies of Hetao Qiang and Hu were relatively easy to buy for Han merchants in Guanzhong.

When Li Su saw the samples brought by Zhuge Jin, he was almost shocked: Isn’t that a kind of inferior heavy oil? It turns out that the "Han Shu. Geography" records that there is a small amount of heavy crude oil flowing in northern Shaanxi. No wonder in the later Tang and Song dynasties, barbarians like Xixia could use fierce tinder oil as weapons. At that time, there was a small amount of self-producing oil in the Hetao area, and they could be self-sufficient.

Of course, crude oil is not so easy to burn directly, but it is still a bit military promising to treat it a little, filter the heavy impurities, and add the lightweight part to other auxiliary materials.

At that time, Li Su didn't expect any occasion to need such a weapon, so he didn't think much about it.

...

However, since he wanted to help Zhang Fei find a way to break Gan Ning's naval warship today, Li Su sorted out all the stirrups and gunpowder that he couldn't use in his mind, and finally keenly fixed them on the turmeric oil.

"How do you make a simple combustible bottle? The type of Molotov cocktail seems to use gasoline instead of hot turmeric, and also add raw rubber, sugar, rags, etc.

Rubber is no longer aware of it, it is an American crop. If you want sugar, you can look for it. It seems that not only have you never heard of white sugar, but you have never seen brown sugar yet…”

When Li Sunian heard this, she immediately ordered someone to find sugar, and emphasized that if it was sugar made of bamboo cane.

His subordinates had long been accustomed to Li Zhonglang's "luxury life" and always wanted to make up luxury and hobbies. However, General Zhenxi still allowed him to spend time and drink and no matter what he wanted. So after his subordinates tried their best, they dared not speak out and brought Li Su a cane glue - a sticky sugar ball formed by evaporating sugar cane juice directly under the sun.

Li Su didn't know that brown sugar was not made by boiling in history until the Sui and Tang Dynasties. Before this, although bamboo cane and elm were introduced from the body poison (India) during the Qin and Han Dynasties, the Han people still rely on the sun to produce sugar. Fortunately, sugar cane grew in humid and hot areas in the south, and Shu was closer to the body poison. Otherwise, Li Su would not be able to get sugar cane even if he ran away after slapping his head.

"There is no way, just make a simple mistake. Just ask the turbid oil bought by the Qianghu merchants, mix it with sugar glue and other auxiliary materials to try it. Is it fast to burn the boat?"
Chapter completed!