He just thought Qi Ziqi's hobby was strange. Aren't all children like storybooks? The kind of book "Physics" is esoteric and difficult to understand, that is, scholars like them who have read it for more than ten years have a headache, how can a three-year-old child be interested in this kind of book?

"Because I wrote that book with my mother when I was still in my mother's womb, I like that book very much." Qi Ziqi said very proudly, "In addition to this book, there is also "Chemistry". ”

Naturally, the reasons are not all. Rather, he found what was written on it very interesting. For example, two balls hit the ground at the same time, or different liquids can change color when poured together, it was just incredible, and he wanted to know why this was happening. Dad and mother said that those two books are about the truth of this, so those two books are now more attractive to him than story books.

Zhang Hongwen was stunned by the meaning of his words.

Qi Ziqi's sentence "Mother, you say it in the book", Zhang Hongwen understood it as "Mother, you said it in the book on the shelf", and did not take it to heart. But after listening to Qi Ziqi's words at this time, he looked at Du Jinning with his mouth open and asked, "Then "Physics" and "Chemistry", you wrote it?" ”

Du Jinning said with a smile: "It's just a summary of the theories of pre-personality physics, and I don't dare to take credit." ”

Zhang Hongwen's "Physics" and "Chemistry" can be "excellent", because he is really interested in this knowledge. These two books opened a door for him, and after he studied these two books, he also searched for many theories of his predecessors in this area, but finally found that the theories of his predecessors were often a little taken for granted, or they only knew that two substances would react together, but they did not know why they would react. The same goes for knowledge of physics.

Du Jinning's two books fundamentally solve this problem, let them know what it is, and why it is so.

At that time, they were extremely emotional, thinking that the people who wrote these two books really didn't know what kind of genius they were, how could they know so much.

Now that he found out that these two books were written by Du Jinning, Zhang Hongwen felt that it was becoming more and more mysterious.

Is this still the Du Jinning he knew before? In the past, Du Jinning just had a better memory and was smarter than others, but he was not smart enough to be completely different from them. But now, in just a few years, has Du Jinning become so smart? Not only did he grow high-yielding rice, but he was able to write two amazing books.

Is this place in the capital really so awesome? A person who comes here to live for a few years can be reborn and out of the mortal realm?

At this time, Zhang Hongwen's desire to come to the capital to live became more and more urgent.

If Qi Muyuan knew about Zhang Hongwen's brain supplement at this time, he would definitely tell him that you think too much.

At this time, Qiu He walked in and stood at the door to salute.

Du Jinning knew that she had important business to report, otherwise she would not have come here knowing that there were guests here.

"What's the matter?" she asked. ”

"Master Xu from the Ministry of Industry came over and waited in the small hall in front. He said that they had improved the princess's pointers and that the bike was now much better. Ask the princess when she will have time to go over and have a look. ”

"I have guests here. You tell him to come and see when I have time. Du Jinning said.

As soon as he heard that Du Jinning refused to be an official of the Ministry of Industry, and also mentioned what bicycle he had improved, Zhang Hongwen couldn't sit still.

He stood up: "Princess, colt, if you have something to do, you should be busy first." Since I came to the capital to take the exam, the time I stayed here is not short, and there are many opportunities to meet in the future, so you don't have to delay your business for me. ”

As he spoke, Qi Ziqi had already rubbed to his mother's side, and at this time, he stretched out his little fat hand and quietly pulled Du Jinning's clothes.

Du Jinning knew that he was interested in bicycles, and when she went to instruct once, he followed him once, and he remembered this thing very much.

She didn't shirk, stood up and said, "It's okay, let's have a small friendship, and I won't be polite to you." Then he asked, "Where do you live?" ”

"Gui Provincial Hall." Zhang Hongwen said.

Having said that, it is logical that it is time for him to take his leave. But Zhang Hongwen hesitated and stopped.

Qi Ziqi was anxious to see the bicycle, and when he saw this, he couldn't help but interject and ask, "Uncle Zhang, do you have anything else?" ”

"Brother Qi, this is rude." Du Jinning lowered his head and glared at him.

Qi Ziqi blinked innocently.

Zhang Hongwen said embarrassedly: "I, I just want to ask, can I go with you to see what kind of bicycle?" As he spoke, he quickly added, "But it's inconvenient to think about it, so forget it." Saying that, he saluted Du Jinning, "Then I'll leave first." He arched his hand and planned to go out.

"There's nothing inconvenient, let's go together." Du Jinning said with a smile.

Zhang Hongwen stopped, turned around and looked at Du Jinning with a surprised face: "Really?" ”

Du Jinning nodded, and turned his head to look at Qi Muyuan: "Are you free?" ”

Qi Muyuan nodded and said softly, "Let's go together." "Take Qi Ziqi's hand and walk out together.

When I arrived at the Ministry of Industry, I saw a group of people standing in the courtyard, watching a young official pedal a three-wheeled car around the open field.

Seeing Du Jinning and his entourage coming in, everyone immediately greeted her and saluted her and Qi Muyuan: "Princess, donkey." He also gave a salute to Qi Ziqi's children, "Little Junwang, the lower officials are polite." ”

Qi Ziqi returned the salute seriously: "Fortunately, I will be lucky." Everyone couldn't help but want to tease him.

The official who was pedaling in the yard also quickly parked the car.

Seeing the officials of the Ministry of Industry respecting Du Jinning from the bottom of their hearts, as soon as she came in, she was like the stars holding the moon, and Zhang Hongwen's heart was shocked even more than knowing that "Physics" and "Chemistry" were written by Du Jinning.

Du Jinning introduced Zhang Hongwen to everyone, and asked the official riding the bike, "How do you feel?" ”

"It's a lot easier to ride than before." The official looked at Du Jinning with admiration, "If it weren't for the princess, we wouldn't have been able to build this car." ”

"yes, yes." Everyone echoed each other.

"I'll just move my mouth, and it's up to you to build this car." Du Jinning said with a smile.

She said this from the bottom of her heart.

Originally, she really didn't want to modify the car. Because the clover rubber is still in the Amazon at this time, it has not yet been discovered and mined, let alone spread to China. The current iron-smelting technology is also very poor, and it is difficult to add a spring shock absorber to the car.

This is the gap between raw materials and technology, the difference is not half a star, and it takes too much effort to transform.

However, the Great Song Dynasty's finances became more and more abundant, and Zhao Yu vigorously supported her innovation after seeing the steam power she had made, and she simply presided over several projects and transferred some officials to start the industrial revolution.

Steel is the foundation of all machinery. Du Jinning knows that steel is an alloy of iron with carbon, silicon, manganese, phosphorus, sulfur and a small amount of other elements. Therefore, the blacksmiths and officials of the Ministry of Industry were asked to use these ores for repeated experiments, and after a year and a half, the steel was finally smelted.

With steel, springs can be made. Du Jinning came up with the idea of improving the car.

She sent people to Luoyang County in the Qinling Mountains to find Eucommia ulmoides trees, and after finding them, she planted them in large quantities there, and extracted Eucommia gum from the existing Eucommia trees, so that officials could experiment and make elastomers that could be used as car tires.

The wheels of the carriage were equipped with steel bearings and wires, and the wheels were equipped with tires made of eucommia rubber, and the carriage was immediately replaced, which was many times more comfortable than before.

Du Jinning actually doesn't like horse-drawn carts and ox carts and other means of transportation, and she misses the neat streets without horse dung and cow dung in modern times.

Anyway, there was steel, so she simply formed a project team to develop bicycles. The current three-wheeled bicycle is the result of the team's development.