In a blink of an eye, it was time for spring and summer to change again. After dealing with the tails of Hangzhou and Jiangxi, Song Beiyun ushered in a rare free time.

Several little bastards went to school, but they were allowed to go to ordinary schools because only ordinary schools could learn things. If they went to those powerful schools and the playboys met a playboy, then they would be the most powerful in the world without competing for their virtues.

Sitting alone in the yard, listening to the roar of magpies, I suddenly felt a little moved.

"Why are these days so fast?"

Song Beiyun stumbled on it and had been unknowingly this world for more than 30 years. The scene of his previous life had become a mirror and a water moon, and it was completely broken with a touch.

It’s not that he was pretentious, but this person was middle-aged after all, but when he looked back, it seemed like he was quietly entering the city to sell medicine that day, but it was still yesterday.

Some of the people around me have left, some are still there, and some are no longer found. It seems that nothing has changed but everything has changed.

A few days ago, Chang'an wrote to me that Aunt Hong was not in good health and had a ill time. Although she was not seriously injured, Song Beiyun suddenly realized that people really grow old.

Prince Fu returned to Jinling once last month to attend the 10th anniversary of the Empress Dowager. At that time, Prince Fu was covered in black hair, but now he had gray hair like a little old man. He did not perform the performance of lifting a tripod for his grandchildren, but instead spent a good landscape painting.

The bravest and most powerful person in the Song Dynasty could never take the knife again. After the sacrifice, he said a lot in front of his parents' tomb. Song Beiyun looked at him from a distance. Although he didn't know what the prince said, he could probably guess it.

Seeing those who were shining brightly back then, one by one was about to hide among the stars in the sky, Song Beiyun suddenly felt an unspeakable depression.

Maybe this is the midlife crisis. After all, although his pressure has never been reduced, as he grows older, he doubts his abilities more and more, and seems to have gradually lost the courage to move forward.

The Song Dynasty has not been better or worse in the past year, and everything seems to have reached a bottleneck. The previous plan is being carried out slowly and steadily, and the first platform period after rapid development has come like this.

A few days ago, a spring plague occurred in some areas of Lingnan, but it did not cause a major disaster. The icy erosion in the Yellow River section made the Liao Kingdom nervous for a long time. The Yangtze River is still stable this year, but it is said that the Songhua River has been cut off for 21 days.

Things are gathered together, both good and bad.

Zhao Xing seemed very busy, and he was getting busier and busier. He would definitely not be able to come to the negotiations in early June, but he just wrote a letter to Song Beiyun to give him full responsibility, but Song Beiyun handed over this power to Emperor Wanyan because Song Ping had a surname named Song and was his godson, so he wanted to avoid suspicion.

Perhaps it was really time to reach the stage that Song Beiyun felt that he was getting older and more conservative, and seemed to be increasingly unable to withstand the impact of new ideas.

This is not a good thing, he understands it very well. But sometimes there is no way, because he is no longer young and cannot do impulsive things after his most impulsive age. But this world is very joking, and the result of thinking twice before acting is often better than just going straight forward.

Of course he would reflect on himself, but no matter how much he reflected, some things were left uncontrollable, because any decision he made now would involve the diet, daily life of tens of millions of people, even birth, old age, sickness and death.

Otherwise, those who are barefoot are not afraid of wearing shoes. Song Beiyun is now wearing shoes, and these shoes are very expensive and heavy, and they cannot withstand a slight mistake.

There was chaos outside Yumen Pass again. The Western Regions were full of water resources. Every country wanted the Song Dynasty to uphold justice, but the problem was that Song Beiyun was not easy to take over. What was even more dangerous was that the seven countries led by Loulan hoped to accept the land and return to the Song Dynasty.

What Song Beiyun can do now is to temporarily stabilize them, because the Song Dynasty now has no extra resources to support the other side, and there are holes everywhere.

Water conservancy requires money, the Grand Canal needs to be dug, farming requires people, workshops in various places cannot be stopped, railways need to be built, troops need to be maintained, and people's livelihood construction needs to be carried out, and telephone poles have only been built less than 300 kilometers.

The treasury of the Song Dynasty was like radish slices that had been dry for twenty days. The Minister of Revenue now wanted to cut things out of the cracks in the wall.

It's hard, it's really hard. No wonder Zhao Xing doesn't want to be the emperor anymore. Even someone like Song Beiyun who can sit at home for a winter can't sit still.

After sighing, Song Beiyun watched the floating clouds in the sky pass by, and all kinds of tastes pass through his heart.

But he didn't complain, because people are unhappy after all, and he has his sorrow, but who in the world has no sorrow?

From the princes and nobles to the common people, even Zhao Xing lost weight so much that he was worried.

Oh... Some people don't have to worry about those young and young people who are fifteen or sixteen years old, seventeen or eighteen years old. The only thing they need to worry about is the upcoming entrance exam, but this is the simplest of all things in the world.

So when they were in spring, the flowers were blooming and the grass was growing and the warblers were flying, they traveled through the mountains and rivers, made friends with poetry, and forced to express sorrow for new poems.

Speaking of new lyrics, Yan Shu hadn't written lyrics for a long time. His little apprentice Ouyang Xiu inherited his mantra and became vaguely the most famous lyricist in Jinling City.

"hey-hey!"

A greeting suddenly appeared on the wall. Song Beiyun looked in the sound, but found Yan Shu's head hanging there, with a look of excitement.

"What's wrong with you?"

"Let's go, change your clothes and go fishing." Yan Shu raised the fishing rod in his hand and said, "I'm not going to rest. I'll just take a look when I pass by you. You're really here."

"Then will you die when you walk through the main entrance? You are in your thirties. If someone is watching you, will you still behave like a human being?"

"How come you have a burden?" Yan Shu patted the wall: "I didn't know who flipped into the theater to watch the girl change her clothes, but she was caught."

"That's Zhao Xing!"

Song Beiyun sighed helplessly, climbed up from the wall with great difficulty, and jumped off the wall with Yan Shu. He looked back at the broken wall, cursed and said, "I could turn it over with one hand..."

"Okay, you're so old, and you still hope to compete with your youth. After thirty-five years, you can call yourself an old man."

Song Beiyun laughed: "I'm not that old. Thirty-five is the time to be young and strong."

The two of them carried their fishing rods to a secluded wild pond outside the city and sat down. Yan Shu adjusted his posture and leaned on a big rock to catch fish leisurely.

"By the way, I've found a good master for your second child."

"Who?"

"My cousin from the north slope of Hongwenguan, Bao Zheng Bao Xiren from Luzhou. He is still a fellow villager with you."

Song Beiyun laughed as soon as he heard this: "When I knew him, he was only in his early 10 years old. Now he is all 25 or six?"

"Yes, he is not bad. Now he is the editor of Dali Temple, majoring in law entries. He is upright and knowledgeable, and can just win the hearts of your second child."

"If you don't have it, let the boss go, the second brother won't have it." Song Beiyun shook his head and said, "Don't underestimate the second brother. He has too many thoughts, so Bao Zheng can't surrender him."

"Okay, you can make your own decision anyway, your son."

The two caught fish by the pond for an afternoon, but there was no harvest until a farmer led the cow and asked what they were doing.

"Fishing." Yan Shu replied.

The farmer shook his head: "You can't catch here."

"Isn't this a wild pond? Why can't I catch it? I searched for a while and found such a good place."

"If you say you can't catch it, you can't catch it." The old farmer was also impatient: "You can't catch anything in your life if you fish like this."

Song Beiyun laughed when he heard this: "Why is this?"

The old farmer looked at them like a silly boy and said disdainfully: "What a foolish scholar who is inseparable from grains."

Yan Shu was about to have an attack, and then he heard the old farmer say, "This place turned out to be a lime pit. A few days ago, it rained and fell into the pond. Now it was covered with lime. Not to mention fish, even if you put your hands in, you would scratch it."

Song Beiyun looked inside and felt a slight burning sensation. Then he took it up and put it under his nose and smelled it. Sure enough, there was a strong smell of alkali...

"Hahahahaha...we were both stupid."

The old farmer took the cow away, Song Beiyun laughed, but Yan Shu blushed.

"Two stupid scholars who don't know the difference between grains." Song Beiyun teased, but then threw the fish hook in.

"It's said it's a lime kiln, why are you throwing the hook?" Yan Shu was quite embarrassed: "I'm just like a silly boy without knowing it. Why do you still look like a silly boy after you know?"

Song Beiyun stared at the fish float quietly, his eyes dazed: "Come on for a while."

Yan Shu said something but still didn't say it. Then he threw the hook into the dead pond again and quietly caught fish.

On a wonderful spring afternoon, they wasted it by this pond where fish could not be present, but there seemed to be no regrets. When they returned home, they felt refreshed.

In the evening, Song Beiyun tutored his little bastards as usual. Fortunately, these children were smart people. Although they liked to provoke children, they not only had excellent grades. Later, there was nothing more to teach, so Song Beiyun started to talk about chemistry to them.

Other subjects are not good, but Lao Song is still quite good in chemistry. He is still the leader in the chemistry industry in the Song Dynasty. If it weren't for the Song Beiyun Science Award, he would have won at least ten years of science awards for chemical fertilizers, smokeless gunpowder, TNT and other drugs.

"Father, when I was in school, I heard from my husband that penicillin is a great favor and saved countless people. Is it your trick?" When the third brother heard Song Beiyun talk about penicillin, he looked at his father with admiration: "I haven't heard of it."

"You have been thinking about my princess all day long, how could you hear that? My uncle not only produced penicillin, but also fertilizers, but also something that the teacher said was of great merit."

"But there is still explosives." The second son said gloomyly: "I killed countless people."

"Can't explosives be mined? You need to open the road, why do you always think about killing people?" Zhao Huan said dissatisfiedly: "Young people are so determined to kill?"

Seeing that the two were about to arguish again, Song Beiyun raised his hand and waved it: "There is no need to discuss whether to kill or open the way. Just like a kitchen knife, if you kill someone, it is a weapon, and if you cut vegetables, it is a kitchen utensil. Okay, that's all today, let's go and rest."

The little bastards scattered, but the third brother came up sneakily with a flattering smile on his face.

"What's wrong? You know you have something to ask me for when you see your virtue." Song Beiyun put down the book and looked at his silly son with a love-minded mind: "Did you ask me to teach you how to choose a gift for your sister?"

"No, no." The third brother waved his hands repeatedly: "Father, I want to learn chemistry."

Song Beiyun raised his eyebrows: "You are studying chemistry? Your mother is unhappy."

The third brother praised his face and sat there complained: "Mom always told me to let me learn more about the country's strategy with you, but I am not interested. I like chemistry, but the teacher in the school doesn't teach him, and he doesn't know either. I also like mathematics, and I can understand my senior sister's notes."

Song Beiyun almost choked with a mouthful of tea. He quickly swallowed the water in his mouth: "You said you can understand your senior sister's notes?"

"Yeah!" The third brother nodded and said, "I understand at a glance."

Song Beiyun said nothing and sent the third master to Zhang Qing overnight...

As for why, because Zhang Qing’s notes are the Book of Heaven, Song Beiyun couldn’t understand them at all, and the third master could understand them, which means that this master was a genius!

Zhang Qing didn't believe it at first, but after all, he was his master and his junior brother, so she decided to give it a try. But when he took out the notes, the third master really explained the contents accurately. Although he couldn't figure out many things, he could understand after explaining it a little.

Then from that day on, the third master never went to school again... In an instant, the senior sister became the master, and the two of them secretly gathered together every day to mess with a lot of things that others could not understand.

Song Beiyun was both happy and worried when he saw this, because that was the third master... If it were the eldest and the second master, it would be fine, but it was the third master.

How should I explain this to Fo Baonu? The prince of Liao, the future emperor of Liao, was actually addicted to a bunch of numbers that were useless to most people.

If Fo Baonu knew about it, she would come from thousands of miles away with a knife and chop Song Beiyun, it would be considered that Song Beiyun would not know this girl.

So he was worried, but as the third master began to be anxious and walked on the road of mathematicians, Song Beiyun had no choice but to be happy.

On the seventh day, the third master suddenly asked Song Beiyun a question while eating. He said: "Father, my senior sister and I don't understand why a ball of paper burned into ashes in a closed glass jar, but its weight does not decrease. If this is the case, is the mass of all things in the world constant and unchanged no matter what form they appear? Then if we assume that in an absolutely confined space, that is, no matter any physical or chemical changes occur, the mass of the object remains unchanged, then the mass seems to be the fundamental nature of matter, right? It is a constant quantity, so what is the reason for its morphological change?"
Chapter completed!