Uncle Wang, Zhao Qian, and Fengling were all immediately restrained. How long has it been since then? Why did the imperial court issue another decree and reward?
Uncle Wang looked at the stack of banknotes and two paintings in Li Yu's hand and said excitedly: "Sir, you really amaze us, 5,000 taels!"
Li Yu said, "You can brag about 5,000 taels, but try not to talk about these two paintings."
"Are they worth more than 5,000 taels of silver?" Zhao Qian didn't understand.
"It's hard to say now, but in the future there will be no comparison." Li Yu said.
Uncle Wang and Zhao Qian were shocked: "That's the treasure!"
Fengling was trained in chess, calligraphy and painting in the brothel. She laughed and scolded: "Don't embarrass yourself in front of your husband! Our master is an educated man. You can learn more from now on. You will embarrass him even when you go out."
."
Uncle Wang and Zhao Qian both said, "Please give me more advice from Miss Fengling in the future!"
While several people were talking, a beeping sound came from the east wing.
Uncle Wang said: "Sir, it's your black box again. Why does it keep making noises?"
Li Yu pointed to the tall telegraph wire outside and said: "The telegraph wire set up outside the house is for it. This is called a telegraph machine."
Li Yu came to the east wing and translated the message through Morse code. It was sent from the Royal Academy of Sciences, and the sender was Lord Kelvin:
"Mr. Li Yu, I am surprised to hear that you won the mathematics award in Sweden and published a mathematical book. I would like to express my deepest congratulations. We hope that you will write another manuscript for us! I look forward to it very much!"
Okay, this is jealousy.
But Li Yu happened to have something to send. He didn't just stare at the Siberian wilderness every day on the train.
Li Yu plans to return to his hometown of physics this time and publish an inspiring article.
Inspired by nature is one of his strongest areas, quantum mechanics.
However, he also understood that this process would be long, and he should not be too reckless at the beginning. After all, Master Planck introduced Planck's formula as early as 1900, and no one has paid attention to it until now.
——Quantum mechanics is too complex and needs the nourishment of soil and the irrigation of time.
He thought for a long time before he came up with an ingenious starting point - discussing why magnetism is produced.
This question also belongs to the category that seems very simple, but in fact the truth is very profound.
Because if you want to explain why the magnet attracts iron, you need to use quantum mechanics in the microscopic field!
Therefore, it is also a perfect case that is a common life phenomenon but hides a great truth. It is very suitable to be written as a paper. It can have a certain explosive point and will not be left out, otherwise it will lose the significance of inspiration.
In this era, through the efforts of a bunch of big guys in electricity, everyone already knows the existence of electric charges, so it is speculated that the magnetism of magnets is also due to the existence of "magnetic charges", which are similar to electric charges.
But this is definitely not the case in fact. Otherwise, according to this theory, one side of the magnet has positive magnetic charges and the other side has negative magnetic charges. If the magnet is not paying attention and is suddenly cut off in the middle, it will become a case where both sides have positive magnetic charges.
Is there a negative magnetic charge on one side?
"Magnetic monopoles" that are the same as positive and negative charges have appeared (just for example, it does not refer to the magnetic monopoles predicted by Dirac, and this has not been discovered).
But in fact, no matter how many times you cut it off, the magnet will quickly re-form the North and South Poles.
So "magnetic charge" does not exist, only electric charges exist.
The electric charge produces an electric field, and the relativistic effect of the electric field produces a magnetic field.
Anyone who has studied junior high school physics knows that electricity generates magnetism, magnetism generates electricity, and electromagnetism is a family.
To explain why the magnet can attract iron, we must penetrate to the microscopic level: a few years ago, electrons were discovered. Everyone knows that particles are charged, and the movement of charged particles generates a magnetic field.
The famous nuclear magnetic resonance actually uses these principles.
In short, the magnet has so-called "magnetic chips" formed by microscopic particles that are arranged neatly in a certain sense, thus forming a magnetic field.
As for iron, cobalt, nickel, etc., there are chaotically arranged "magnetic chips" inside.
When the magnet is close to the iron, cobalt and nickel, the magnetic field lines will straighten out the chaotic magnetic chips in the iron, cobalt and nickel, and then they can attract each other.
So in essence, the magnet attracts iron because of the interaction between magnetic fields: it first turns you into a magnetic field, and then attracts you.
Although this paper is not long, it actually uses microscopic models.
Of course, Li Yu won't explain it too clearly. He just needs to explain the truth. As for how it will develop later, he doesn't need to worry too much.
Li Yu was very satisfied with this short paper and was ready to send it out immediately.
Li Yu walked out of the door, just as Zhao Qian came back happily pulling Fengling. Fengling was holding some cheap rouge, gouache, combs, mirrors and other items that she had just bought.
Fengling said: "Not to mention, this newly opened market is really full of everything."
Zhao Qian scratched his head and said, "I'm sorry, Fengling, I can only buy you these bargains, which are not as good as your previous ones."
Before Fengling was in the land of fireworks, the paint and powder she used were of the highest quality.
Fengling said: "Don't say that!"
Li Yu came over and said: "From now on, when you buy daily necessities, clothes, shoes and hats, just buy them and ask me to reimburse you after you buy them."
Fengling said: "Sir, that's okay! It's just clothes. These rouges and gouache are not necessary for a maid."
Li Yu smiled and said: "As you said before, we can't lose the face of our Li family. You must dress better in the future."
Fengling and Zhao Qian said gratefully: "Thank you, Mr.!"
Li Yu said to Zhao Qian: "Let's go out and go to the Qing Post Office to send letters."
"Come on!" Zhao Qian took out a towel and wiped the car seat, "Sir, please get in the car and let me, 'Yiyuanyan'er' in Beijing, take you through the streets!"
Zhao Qian was very fast. When he finished sending the letter and walked back, he did not forget to tell Li Yu what was new: "Sir, do you know that the Dong'an Market has just opened in Jinyu Alley, and it is very lively. Feng and I
Ling is the rouge and gouache I bought there, and it has everything you want."
Dong'an Market is the earliest comprehensive shopping mall established in Beijing. It is located next to today's Wangfujing. After more than a hundred years of vicissitudes, it is still in existence.
Li Yu became interested: "Let's go and have a look!"
When passing by Jinyu Hutong and Dong'anmen Street, the familiar street vendors were gone, not even the Ding Deshan stall where Li Yu often went to eat noodles.
"Both sides of the road are really clean," Li Yu said.
Zhao Qian said: "Yes, sir, I heard that it was because it delayed the officials from going to court to enter the palace. Natong Shangshu, who lives in Jinyu Hutong, drove all the vendors to Dong'an Market."
Dong'anmen is the only way for officials living in Dongcheng, Beijing to go to court. More and more vendors are blocking the road along the street, and sometimes even cars and horses can't pass. Every day is like going to a market.
"It's not a bad thing to gather them together and form a shopping mall," Li Yu said.
Zhao Qian said: "At the beginning, many vendors were reluctant to come, and some ran away to the temple fair. However, the market became more and more prosperous, and vendors came naturally."
Today's capital does need a big market. When the Eight-Power Allied Forces captured Beijing in 1900, the large fence outside the front gate was burned to rubble. The traders inside used to wander around in the past two years. Now they have a place to stay and quickly moved to Dong'an.
market.
Li Yu walked inside. The newly established Dong'an Market was very simple. There were street vendors, people setting up tents, and people pushing carts.
However, it is easy to choose when you gather together. After all, they sell everything, including snacks, groceries, vegetables, fruits, clothes, shoes and hats, etc. Most of them are small stalls.
Li Yu found Ding Deshan in the market, walked up to him and asked, "How is business lately?"
"Hey! Sir, long time no see!" Ding Deshan said, "You can see that the business in the market is pretty good. Regular customers also know me and come here. Now many stall owners from other places also eat me.
Boiled noodles. Would you like a bowl of noodles, sir?"
"Make me four bowls of noodles and take them away," Li Yu said.
"Okay, please wait a moment, sir!"
Li Yu saw a green ticket under Ding Deshan's money box and asked, "What is this?"
Ding Deshan said as he walked down: "After paying the land fee, the market will give you a ticket. If you don't have it, you will be kicked out by the patrol station."
Li Yu pointed around and asked, "Do all stalls have tickets?"
Ding Deshan said: "Both are available, but they are different. Sir, please see that this green ticket is specially issued to a stall that covers an area of 10 feet. It costs 70 Wen per day. If the stall is only five feet square, it is a pink ticket."
, 40 Wen per day. I heard that there are larger stalls that are more than 1.5 feet tall, which cost 110 Wen, and a green ticket and a pink ticket will be issued."
Li Yu said: "I didn't expect the management to be quite strict."
"Isn't that right!" Ding Deshan continued, "The tickets are collected at the market close every day, and you have to buy new tickets when you come the next day."
Li Yu said: "Then they really save money on tickets. They only need these tickets and send them back and forth every day."
Ding Deshan packed the four boxes and said, "Sir, your noodles."
Zhao Qian took it and said to him: "I will bring the box back later."
Someone behind Li Yu saw this and shouted to them: "Beef noodles are a perfect match with fried belly. Your Majesty, please order another fried belly!"
Ding Deshan said to Li Yu: "My lord, he is Wang Fukui, the 'King of Exploded Belly' in Dong'an Market. Although the price is not cheap, the taste is nothing to say."
"Since it was recommended by you, I must try it," Li Yu said to the "Burned Belly King", "Bring me four portions of the fried belly."
Wang Fukui shouted: "Come on! Four portions! 80 pieces in total."
The filling is huge and very affordable.
Wang Fukui was the first generation of "explosive belly king", and then the second generation "explosive belly king" Wang Jinliang directly developed into a businessman and also established the brand name "Xi Deshun".
This is a century-old brand that continues to this day. Hou Baolin will say in his a cappella songs and storytelling: "When you go to Dong'an Market, there is Xi Deshun..."
Of course, not only Xi Deshun, there are many century-old brands born in Dong'an market, such as Daoxiangchun, Paodu Feng, etc., which have been passed down to this day.
The bean juice seller next to him saw it and called out: "Sir, please have some bean juice too!"
Li Yu's heart trembled. He really couldn't drink the bean juice.
Li Yu asked Zhao Qian to pick up the stuffed tomatoes. When he was about to go home, he suddenly saw something "fresh" and asked, "Shopkeeper, how do you sell your tomatoes?"
"This is called foreign persimmon, and it's very delicious." said the shopkeeper.
Li Yu smiled and said, "Okay, then weigh ten catties of foreign persimmons for me."
Zhao Qian took one look and said, "Sir, what is this?"
"A kind of vegetable, delicious and nutritious." Li Yu said.
Zhao Qian looked at the red fruit and said, "It looks like it's poisonous. Can I eat it?"
Although tomatoes were introduced to China as early as the Ming Dynasty, their impact was very small, and few people ate them until the late Ming and early Qing dynasties.
The large-scale planting and promotion of tomatoes will have to wait until 60 or 70 years later.
Li Yu said: "Of course you can eat it, I will cook it for you when you get back!"
There were really a lot of things to buy now, so Li Yu and Zhao Qian left the Dong'an Market.
Although the market is still very dilapidated now, within a few years, Dong'an Market will gradually develop from an open-air market with stalls to an all-encompassing market including shops, businesses, bookstores, and entertainment.
supermarket.
When Li Yu got home, he went straight to the kitchen, "Fengling, crack some eggs for me, I want to show off my skills and make some dishes for everyone!"
Fengling was shocked and said: "How can the master of the house cook in person? Sir, please stop working. Just tell me what you want to eat and I will cook it."
Li Yu took out the tomatoes and asked, "Can you make this?"
Feng Ling said in surprise: "What is it? It looks scary."
Li Yu laughed: "I'm just saying, I'll do it!"
Although Li Yu's cooking skills are average, he can still make scrambled eggs with tomatoes, which is the most common home-cooked dish.
Not long after, a plate of red and yellow dishes was brought to the table.
Li Yu said proudly: "Try it!"
But Uncle Wang, Zhao Qian and Fengling didn't dare to eat. They looked straight at the plate and said, "Sir, please don't scare us."
"Let me be the first person to eat tomatoes." Li Yu picked up the chopsticks and took a bite: "Yeah! Fortunately, I added sugar, it tastes great!"
The three of them saw Li Yu moving his chopsticks and dared to taste it. Once they started eating, they couldn't stop eating.
"Wow, sir, I didn't expect you to be a chef!"
"Yes, he is also a chef of watercress!"
"I didn't expect that our master is so versatile. I think this dish is worthy of the restaurant in Qianmen!"
Li Yu said with a smile: "This is not watercress, it is an authentic Chinese dish. If you go to any country, no one will make scrambled eggs with tomatoes for you, even if they have no shortage of tomatoes or eggs."
Fengling immediately said: "Sir, although I can't learn your Western knowledge, I must learn this dish!"
"Next time I cook it, keep an eye out! What's more, tomatoes can not only be used for cooking, but can also be eaten directly."
Li Yu then ate a tomato raw. After seeing it, several people followed suit. It was indeed sweet and delicious, and they praised it greatly.
As the first of the four common dishes in China, and the first dish for everyone who learns to cook, scrambled eggs with tomatoes, which can be called the "national dish", actually only officially appeared around the 1940s, but Li Yu made it
It was released forty years in advance, which can be regarded as a moderate "initiative".