He Erniu is really happy during this time.

She was admitted to Beijing University, and she was admitted to Beijing University by her own ability.

He Erniu was happy when she thought about it, and she felt that the days were getting more and more rushing.

The professor of the family where she worked as a nanny was surnamed Hu, and He Erniu was called Grandpa Hu later.

Professor Hu and his family are really good, and they have also had a relationship with He Erniu over the years, treating her as their own granddaughter, knowing that He Erniu was admitted to Beijing University, and the two of them are also very happy.

also said that he wanted to buy something for He Erniu.

Where can He Erniu ask for their money?

To be honest, He Erniu has also saved some money in recent years, which is completely enough for her to study.

She is now worried that if she goes to school, what will Professor Hu and his family do?

If she looks for a nanny again, He Erniu herself is a little worried.

What if the babysitter you find is not diligent? What if the person you are looking for is not very good-eyed?

Anyway, there are a lot of problems of this kind and that.

Later, He Erniu also discussed with Professor Hu, saying that she was also studying at Beijing University anyway, and she bought a bicycle after she went to school, and came back every day to clean up the housework and cook for Professor Hu's family, and it was not too laborious.

But Professor Hu and his family disagreed, feeling that this would delay He Erniu too much.

Then Professor Hu found a widow in her forties from her hometown to work as a nanny at home.

This woman is related to him and is also an honest person, so she should be reliable.

Then He Erniu went to school with confidence.

She was in the capital, so naturally the report was early, and after the report was finished, she cleaned up the dormitory and began to help the seniors to do some reception work.

On this day, He Erniu was greeting the new year at the door.

I saw a tall, thin and handsome young man walking over.

"Are you so quiet?"

The young man asked, He Erniu was stunned, and after a while, he said, "I am, you know me?"

The young man smiled: "Haven't you received the letter from Ning Ning to you yet?I'm Xiao Yuan, she should have mentioned me to you earlier." ”

He Erniu then remembered that An Ning had indeed mentioned Xiao Yuan in her earlier letter, and she also knew what the relationship with Xiao Yuan was: "It turned out to be you, you were also admitted to Beijing University?"

Xiao Yuan nodded: "Well, no, An Ning prepared something for you when I came, let me bring it to you." ”

He Erniu was amused when she heard it: "She also brought me something, how old is the little girl, how much money can she have......"

Xiao Yuan gave her the things he brought to He Erniu.

He Erniu took her things and grabbed Xiao Yuan's luggage: "Go, go, sister will take you to sign up, and then take you to find a dormitory, I have been here at Beijing University for several years, and I am familiar with the ground." ”

He Erniu was really enthusiastic here, took Xiao Yuan to sign up for tuition, and took him to find the boys' dormitory, and said that she would help Xiao Yuan clean up the bed or something.

How could Xiao Yuan let He Erniu work for him, and when he arrived at the door of the dormitory, he hurriedly said: "Sister, I can really do anything, don't bother you, so let's wait for me to clean up and invite you to dinner." ”

He Erniu smiled: "You hurry up and pack up, I'll wait for you downstairs, I'll invite you to dinner after you've packed up, and then take you around the campus to recognize the road or something." ”

This time, Xiao Yuan didn't refuse.

It is one thing for He Erniu to have a good heart, she is not twisted at all, she is a hearty and generous person, if Xiao Yuan is too polite with her, it will be obvious.

Xiao Yuan entered the dormitory to put things in place and make the bed.

He's used to doing all of this, and it didn't take long to do it.

When he went downstairs, He Erniu was still waiting downstairs.

The two of them went to the cafeteria to eat, and He Erniu also introduced Xiao Yuan to which canteen had the best food, and which canteen gave more food.

Xiao Yuan waited for He Erniu to leave, so he hurriedly called An Ning and reported all the things that happened to meet He Erniu this time.

After An Ning heard Xiao Yuan confirm that He Erniu's character was good, he could be regarded as truly recognizing He Erniu.

An Ning also went to the second year of high school at the beginning of school, with a liberal arts and science major, and she chose science.

After that, she goes to school every day, and now she reads more and more books, and she has finished reading all the science books she can buy, and she feels that the knowledge in these books is too simple, and she wants to read more advanced and professional books, but such books can't be bought outside.

Zhang Heping watched his daughter learn more and more, but he couldn't buy books that she could read, and he was also anxious.

Later, Hou Jun found out about this, and asked someone to buy some books from abroad and send them back, so that An Ning could be regarded as having books to read.

When others go to high school, it's like a war, racing against time every day, all kinds of exam questions, all kinds of homework can make people crazy.

But Anning's sophomore reading is particularly leisurely.

She really has nothing to do in school except for reading some professional books, just playing with her classmates.

An Ning felt that if she continued like this, she would grow hair.

I just wanted to find something to do.

She watched Zhang Heping and Secretary An get older and older, and they had to ride bicycles back and forth every day, if the road was a little farther, it would be really tiring to ride, so she thought about making a few electric cars for the two of them to ride.

In fact, it is really not difficult to make this electric car, if it is put in the future, it is really not technical.

But today, it's high-tech.

The main difficulty of making an electric car is the battery.

Batteries installed in electric vehicles need to be able to store large amounts of electricity, charge quickly, and not bulkily.

At this time, the batteries are still the kind of dry batteries, and this kind of battery is impossible to meet the needs of electric vehicles.

If Anning wants to make an electric car, it first needs to make a battery.

An Ning didn't want to do any solar cells, bioenergy batteries or anything, this is too high-end, and it's too troublesome to do, so she wants to make lithium batteries.

An Ning asked Zhang Heping to help buy a lot of materials, and every day after school, he went to the room that he had specially built to do experiments.

That's it, in the winter, An Ning finally made the electric bicycle.

It happened to be a Sunday, and An Ning finished the final work early in the morning and pushed the electric car out of the house.

Zhang Heping was making breakfast, and when he heard the movement, he turned his head and looked: "Ning Ning, where did you get a bicycle?"

An Ning asked Zhang Heping to come over: "Dad, I didn't do it, I did it, this is an electric bicycle, you don't need pedals after riding, it doesn't take any effort, and it runs faster than a bicycle." ”

"Really?"

Zhang Heping was happy when he heard it: "Then let's try it." ”

Secretary An heard the movement from the house and came out.

So, the three of them pushed the electric bicycle out, and Zhang Heping tried it in the yard first, not to mention, it was really effortless, and it was also very easy to ride.

Riding in the yard was not enjoyable, so Zhang Heping went out to ride and ran for an hour on an electric car before coming back.

When he came back, Zhang Heping had a smile on his face: "Ning Ning, this car is good, it saves too much effort, it runs fast and steady, and it is much more comfortable than riding a bicycle." ”

An Ning smiled: "That's for sure, I just watched you and my mother ride too tired, so I wanted to be an effortless one." ”

Zhang Heping sat down and asked An Ning: "You said that this is called an electric car, it must be powered by electricity, you tell me how this electricity is powered." ”

An Ning simply talked to Zhang Heping, and the most important thing was lithium batteries.

Although Zhang Heping doesn't know advanced science or anything, he knows what this lithium battery is equal to.

This is a new type of battery, and it can be said to be a new type of energy source that is more efficient than dry batteries.

Zhang Heping was almost out of breath when he heard An Ning finish speaking.

He hurriedly ran to the house to call a comrade-in-arms in the capital.

His comrade-in-arms is now in the scientific research institute, specializing in many scientific research projects.

Zhang Heping's comrade-in-arms is called Yu Shen, and as soon as he heard Zhang Heping say about lithium batteries and electric vehicles, he immediately listened.

After listening to Zhang Heping's story, Yu Shen knew that this matter was not simple, but he didn't believe that an eleven or twelve-year-old girl would make such a high-tech thing.

He decided he had to take a look, and report back to him when he had actually seen it.

Yu Shen bought a train ticket to S Province at that time, and went straight to the provincial capital without delay.