In Pengbu Town, Zhang Xingxing started to sell tea eggs in the morning.

After the tea eggs were sold, he picked up the textbook, and under the guidance of Zhao Gaohong, he made rapid progress, from not being on the road before, to already liking it.

Now he has learned the knowledge of the third year of junior high school, those exercises in this era have not been developed in twists and turns, and many of the knowledge is not as complex as in later generations, which are the most basic.

It's not like when he was old and his brain couldn't turn for a long time, but now his brain is very bright, plus he doesn't learn foreign languages, there is nothing messy to learn, he just learns a few courses, can he not be happy?

Because the earliest college entrance examination did not have a foreign language, unless you want to apply for an English major, you don't need to learn a foreign language, which makes Zhang Xingxing have a lot less study.

However, in this era, there is a special course in mathematics called "Geometry".

Now Zhao Gaohong is teaching him geometry.

From straight lines, rays, line segments to parallel lines, angles, trigonometric functions.

Now he is learning the Pythagorean theorem.

Teacher Xiao Zhao made Zhang Xingxing very interesting to listen to, because she spoke very interestingly, that is, the math class will be told to you as a story class.

What is the Pythagorean Law.

On a weekend evening in 1876, there was a middle-aged man named Garfield, who was walking and enjoying the view of the dusk, and he noticed that two children were discussing something, and saw that they were drawing triangles on the ground, so the comrade asked the two children, "What are you doing?"

A boy looked up and said, "Excuse me, if the two right-angled sides of a right-angled triangle are three and four, how long are the hypotenuses?"

The middle-aged comrade replied: "It's five." ”

One of the young boys asked, "If the two right-angled sides are 5 and 7, what is the hypotenuse length of this right-angled triangle?" ”

The middle-aged comrade said without hesitation: "The square of the hypotenuse must be equal to the square of 5 and the square of 7." ”

The boy asked, "Do you know the truth?"

The middle-aged comrade was speechless for a while, unable to explain it, and felt very uncomfortable, so he went home and devoted himself to research, and after thinking and calculating, he finally figured out the truth and gave a concise proof method.

The middle-aged comrade was a mathematician-turned-president, and his contribution to mathematics was the achievement of the proof of the Pythagorean law......

"You see, can you prove the Pythagorean law?" said Zhao Gaohong with a happy look of testing.

"If I can prove it myself, then I'm not better than the mathematician president. Zhang Xingxing blinked vigorously.

"Okay. Zhao Gaohong stuck out her tongue cutely.

Why isn't Brother Happy being tricked?

When she was learning this, the teacher encouraged her classmates to prove themselves, and those students were eager to prove their intelligence......

No way, young people, especially teenagers, like blind self-confidence too much, feel that their intelligence is invincible in the world, Zhang Xingxing is a teenager physically, but psychologically he is no longer a teenager, he will not be blindly confident that he is invincible, he has already realized his lack of knowledge, especially the destruction of the increasingly explosive technological era in later generations, many things he doesn't understand how it works, those computers, mobile phones, how can such small things be omnipotent, those hardware, software for him feel high, so that his self-confidence is low to the dust。

Now, he wants to learn little by little, and the future will no longer be low to the dust.

When he is old, he also programmes, and brightens the titanium box eyes of his blind grandchildren, making them feel that they are eliminated, no, he AI gives him a look, and let them know the bull's nose of their grandfather's algorithm!

It's nasty to think about.

Zhao Gaohong asked Zhang Xingxing to learn several ready-made proof methods of the Pythagorean law.

Three methods, three routines, Zhang Xingxing quickly learned.

"Brother Xingxing, you are a genius at learning, you can learn everything quickly. ”

"Oh, this is all taught by Sister Gao Hong. ”

In addition to mathematics and Chinese, Zhang Xingxing reads the novels in Zhou Yaotian's house.

"Journey to the West", "How Steel is Made", "Morning Flowers and Sunset", ...... Zhang Xingxing's favorite thing to watch is "The Old Man and the Sea", what is it that he also goes to the sea to fish, he has never seen the sea in his previous life, and he must go to see what the sea looks like in this life.

After the beginning of the year, Comrade Zhang Tiande, a ghost in the village, went out, and promised Osmanthus before going out that he would not go out this year and earn work with Osmanthus in the team, but in a blink of an eye, he slipped away in the middle of the night.

For this man, Hao Cuihua also knows his character, she doesn't complain, she is desperate, he can come back for the New Year, their mother is very excited, their father buys them new clothes, Hao Cuihua may not know, in the future, there will be many complete Zhang Tiande in the central and western regions of the land of China, they go out to work, only during the Spring Festival, those women and children who stay at home can see her husband, and the children can see their father.

And Zhang Xingxing's future goal in addition to making money is to make less Zhang Tiande in Dongyang County and develop Dongyang's economy, so that those husbands, fathers of those children, and even the female version of Zhang Tiande will no longer go out to work, but can find jobs locally, they can accompany their children to grow up, and husbands and wives can warm each other's quilts day and night, and there will be less separation.

In the past, Zhang Tiande was a blind stroll around the provinces and cities near Dongyang, but this time he did not wander around, but went directly to the side of the Beihe River to buy raw melon seeds, now is not a good time to buy raw melon seeds, but look at the farmers on the side of the Beihe to keep their own land, there is still a little raw melon seeds in the commune, he thinks that there is a New Year's Eve and then knock, there are more melon seeds over there, and there should be some left.

He was in a town on the other side of the Beihe River, and he really received a lot of raw melon seeds for most of the month.

More than 300 catties of raw melon seeds were purchased at a price of six cents and seven, and how to transport so many raw melon seeds back to Dongyang is a big problem, and it was confiscated by people if it is not good.

In the end, he has been out for many years, which did not stump him, he took a truck on the road, gave money to cigarettes, good words, did not give money to the driver, took more than a dozen cars, he returned to Dongyang Pengbu Town, and almost fell apart with him.

How did Zhang Xingxing know that Zhang Tiande was in town today, and he received a telegram.

He went to the supply and marketing cooperatives with telegraph rooms every day these days.

His second career, he attaches great importance.

Finally, I waited for the letter.

Zhang Xingxing went to pull back three bags of raw melon seeds on the flatbed truck this day, and Zhang Tiande fell asleep directly on the flatbed.

Even the melon seeds brought people with a total of more than 400 catties, and Zhang Xingxing was out of breath.

Back to the small courtyard.

"Second master, I'm home, go to sleep in the Yaotian House, I'm going to move melon seeds. ”

Zhang Xingxing shouted loudly enough, but the other party was still snoring and sleeping on the flatbed.

Zhang Xingxing had an idea.

leaned into Zhang Tiande's ear.

"Osmanthus Erniang, why are you here!"