The advantage of the time-traveler seems to be mentioned in various time-traveling novels, one of which is the prophetic nature of the direction of history. You can pretend to be a god stick, or make a prophecy pretend, and then the impact is very yellow, very violent and powerful.

The other is to invent all kinds of quasi-modern items, and then earn the first pot of gold and N buckets of gold.

However, Zhu Zilong is very self-aware.

He is a sling thread, and his academic performance in modern times, whether it is junior high school, high school, or college, is the kind of 60 points and long live.

He knows history, but it is estimated that 99% of students will not memorize all the details of history, right? (Of course, you have to be able to memorize it all, only a little bit of anti-heaven memorization, that kind of god-level memory.) ）

Like now, he wore it to the Song Dynasty with the help of the system, but so what?

He could remember when the Song Dynasty fell, what year and where the important battles were. Also know some historical celebrities of the Song Dynasty!

However, these are particularly well-known introductions throughout the Song Dynasty, and will never be deliberately focused on a limited period of the Song Dynasty. He Zhu Zilong couldn't run into the palace, and said to the cheap father emperor, I know that you will die a miserable death in the future, and if you listen to me, it will be fine.

Let me ask, is this death, or death?

These larger historical events that are relatively close to him cannot be said in his capacity, and no one will believe them. Small incidents, most of the records in the history books and wild history are not very reliable, you have to believe it all, you are definitely pit yourself.

Maybe some of them are true, but yours must first distinguish, and then you have to recall carefully, the more chaotic the recollection, the more unclear it is, and you can only think from the long term!

It is only temporarily predicting historical trends and events, if the conditions are not ripe. Then we can only focus on invention.

But what is it good to invent?

If it's too difficult, it won't, if it's too high-end, it won't have the technology and conditions, it's too simple to estimate that others will, and if it's too nonsense, it's a cheat!

It's hard!

However, there is nothing difficult in the world, I am afraid of people with hearts, not to mention that Zhu Zilong is still open!

In the middle of the night, Zhu Zilong quietly came to the kitchen of the palace, the kitchen is divided into two sizes, of which the small kitchen is dedicated to the main family. Zhu Zilong first went into the small kitchen, but he rummaged through the small kitchen, but he couldn't find a trace of meat and what he wanted.

So, he had to go to the big kitchen next door to cook for his subordinates, and only then did he find a big piece of pork, which weighed only twenty or thirty kilograms.

Seeing the pork, Zhu Zilong burst into tears in an instant. I haven't eaten meat for several days, and my mouth is watering!

Pork was cheap meat in the Song Dynasty, only the poor would eat it, and people with a little status disdained to eat pork.

Unbelief? Take a look at what Su Shi, who invented Dongpo meat, wrote: "Huangzhou is a good pork, and the price is as cheap as dirt." The noble refuse to eat, and the poor do not understand how to cook. ”

It means that there is such good pork in Huangzhou, and the price is as cheap as dirt; The rich and noble will not eat, and the poor will not cook.

So, how cheap was pork in the Song Dynasty?

During the Chunhua period of the Northern Song Dynasty (990-994 AD), it was recorded that a man named Mu Hui in the capital lost a pig, and the court compensated him 1,000 yuan. At that time, a horse was worth 25 to 50 guan, that is, a horse could be exchanged for 25 to 50 heads of pork.

An adult in the Song Dynasty spent 28 yuan (about twenty or thirty yuan in modern times) to buy pork, and an adult can't eat it for a few days.

This is also why in "Water Margin", we can always hear the heroes of Liangshan say to the shopkeeper, come and cut two catties of beef for me to drink. But I never heard the question of why not cut the pig's head. Because heroes also look down on pork and never eat it!

It wasn't until the Ming Dynasty that people of any class ate pork, which became popular. In the 21st century, pork has long become the most common and indispensable food for our modern people.

Zhu Zilong's current identity is the prince of the Song Dynasty, whether it is in the eyes of outsiders or his family, he should not eat cheap pork.

Of course, if he really wants to eat, no one can stop him. Anyway, he was unreliable before, and his reputation was not good, so it's a big deal to continue to be looked down upon.

However, tonight, Zhu Zilong's starting point was not to steal pork at the beginning.

Rather, it is to conduct scientific experiments for their own fortune.

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Although as a modern person, Zhu Zilong is not a student of chemistry, nor is he a worker in a chemical factory. However, I have never seen a pig walk or a pig, and he has one of the biggest advantages before crossing before, that is, he likes to read online novels.

In addition, when I used to have nothing to do, I liked to talk to people on various online forums, argue, and then watch various videos. Mess up everything to watch!

Everything also likes Chadu Niang! Therefore, after N years of training in online travel novels, forum baptism, video learning, Du Niang and so on, Zhu Zilong actually knows a lot.

It's just that the knowledge that has been learned is generally like the materials in the library, and I can't recall it subconsciously.

However, under the strengthened physique and mind of the main god system, he now has an amazing memory, a violent physique, and has also learned internal strength. Many things that have been subconsciously seen in the depths of the mind can be quickly recalled.

So, it's not a thing for an open life!

After taking the pork and taking some rouge in some warehouses in Fuzhong, Zhu Zilong lifted two empty jars and made a hole underneath. Connect it with a thin tube that's half a foot long (something in a modern travel bag)!

Then, I brought a pot of charcoal, poured water into it, and washed it thoroughly as if I were bathing in charcoal.

Then put gravel, fine sand, and charcoal of different sizes into the jar in layers, pour the liquid into the jar, and then flow out from the thin tube at the bottom of the jar, and a simple ancient filter was born!

In fact, activated carbon is the best filtration effect, but the conditions are limited now, so let's use it like this for now.

Immediately after, Zhu Zilong cut off the fat from the pork and squeezed it into barely viable lard. I also took baking soda from the kitchen, which was used for making noodles, and was available in ancient breakfast shops and large households.

He took an iron basin and poured water over it, and poured all the quicklime into it. Then in the big kitchen, take out the salt brine used by the people, and after a mess.

Well, see this. Probably someone can guess that Zhu Zilong seems to want to make homemade soap.

However, after dozens of minutes, nearly ten attempts ended in failure.

However, Zhu Zilong did not give up, he thought about it for a while, and it seemed that he had made a mistake in the order of remembering.

So, he decided to pick up the extra materials and do it again. First, dissolve quicklime in water to make lime paste, and then pour baking soda into it.

The main ingredient of baking soda is sodium bicarbonate, which reacts with a lime solution, that is, a calcium hydroxide solution. Calcium carbonate precipitates are formed, and a clear solution is formed on top. That is, sodium hydroxide!

Sodium hydroxide, commonly known as caustic soda, is an important industrial and chemical raw material in modern times, which is extremely corrosive. It can be used as an alkaline cleaning agent in water treatment, soluble in ethanol and glycerin!

In the modern 21st century, the largest use of sodium hydroxide is in the manufacture of chemicals, followed by paper, aluminum, tungsten, rayon, rayon and soap.

Even today's laundry detergents (sodium dodecylbenzene sulfonate, etc.) are made from large quantities of caustic soda.

Sodium hydroxide also plays an important role in the paper industry. Due to its alkaline properties, it is used in the process of boiling and bleaching paper pages. It can not only speed up the speed of paper production, but also improve the quality of paper in a large span.

It can even be used to refine petroleum. Of course, with Zhu Zilong's current level of civil science, he can only engage in rough processing.

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