Su Cheng did not send Wang Shengnan home all the time, but just sent it to the city gate and returned.

In the Duke's Mansion, Princess Changle and Wu Xi were chatting.

Just now, Princess Changle pulled Wang Shengnan and kept saying thank you. All of this fell in Wu Yu's eyes. She immediately noticed something strange. It was obvious that the Duke drove a steam car to meet him. In other words, the role of the steam car must be greater than expected.

So, after Su Cheng and Wang Shengnan left, Wu Xi immediately asked.

Princess Changle did not hide it from Wu Xi and the others, and directly told them what happened in the palace.

Wu Xi, Chen Xiao and the others listened attentively, their mouths slightly opened, and their faces were shocked.

Building two railways between Chang'an and Luoyang? I will earn one million trump cards every year from now on?

Can you also load the steam engine on the ship?

Wu Xi licked his lips, his big eyes were very bright: "But the railway from Luoyang to Chang'an can make one million trump cards a year. If the railway is built to Jiangnan, how much money can you make in that year? I'm afraid it's not tens of millions of trump cards?"

Princess Changle smiled and said, "There are many people traveling between Chang'an and Luoyang, so they can earn one million yuan a year. The manpower and material resources required to be built all the way to Jiangnan, and how much land it takes to collect, our Duke's Mansion cannot do it."

"Railways are very important to the court, and the court must control the railway. The section of the railway from Chang'an to Luoyang was replaced by Langjun's technology with the steam engine. In the future, there will be no private railway construction except the court."

"Railway? The road paved with iron. How much iron does it take to get from Chang'an to Luoyang?" Luo Xiangfeng was shocked. She felt that this was almost impossible.

Princess Changle smiled and nodded and said, "It is really not easy to build such a railway. It takes a long time and costs a lot of money. However, once it is built, it will get a lot of benefits every year. Overall, it is still worth it!"

Wu Qi smiled with a roaring smile and said, "Of course it's worth it. Why don't we keep so much money for our family? It's better to invest it in the railway and let the money make money. It's too late for others to envy such an opportunity."

"Next, we have to set the route first and then buy land. Since it is not cost-effective to buy pig iron directly with so much iron, it is better to buy an iron ore, and then even a coal mine."

Su Cheng walked in with great strides. Hearing Wu Xi and the others' comments, he couldn't help but smile and said, "We don't have to worry about buying land. Duke Lu has taken it over. Duke Zhao has many iron ore and expressed his willingness to provide iron. We will collect some of it ourselves. It's not a big problem. It's a coal mine, and it's a British public."

Princess Changle asked in surprise: "When did they say it?"

Su Cheng smiled and said, "Just when I left the palace, they caught up with me."

Wu Yu couldn't help but pout and said, "Don't they think this business is full of money and want to invest in it? Although it does cost a lot of money to build a railway, we can afford it, even more than enough."

Su Cheng didn't care much and smiled and said, "There are many people and the power is great, and there are many people participating. The railway can be repaired faster and operated better."

In Chang'an manor, Wang Qingyun was pacing anxiously in the front hall.

He was completely confused today. After he came back, he thought about it for so long but still couldn't figure out why the weird car could leave by itself without pulling or pushing.

What made him speechless and worried was that his sister has not come back until now.

My sister should know that he will be back to Chang'an in the next two days, so why didn't she wait for him at home?

He actually went to Sujiazhuang as a guest, and he has not come back yet!

If he had seen Su Cheng parading in the street in the city today, he would have been unable to help but run to Sujiazhuang now.

"Why haven't you come back yet?" Wang Qingyun kept paced.

"Young master, young master, the lady is back! The lady is back!" Xiao Si ran over excitedly.

Wang Qingyun walked out of the front hall with great strides and saw that his sister was holding the maid off the carriage, but her expression seemed a little stunned.

As she returned home, Wang Shengnan was indeed very uneasy. The design drawings she was holding in her hand were heavy. In her opinion, this was not a precious or not. These represented Su Cheng's deep affection for her.

"Sister, why are you back? Don't you know that I've been back in Chang'an these two days? Why haven't you been waiting for me at home?" Wang Qingyun asked repeatedly.

Wang Shengnan said calmly: "You'll come back when you come back. I didn't lock the door and didn't let you come back. But I haven't seen you for only half a year. Do I have to go out of the city to greet you?"

"You didn't ask you to go out of the city to greet you. You can just wait at home to greet you!" Wang Qingyun muttered in a low voice. No matter what, he is a brother and sister. He didn't think about seeing you for half a year?

"What are you doing in Sujiazhuang? Do you know the weird car made by Su Cheng? It's so strange. How can you walk by yourself without pushing or pulling?" Wang Qingyun asked in confusion.

Wang Shengnan smiled and said, "I know, that's called steaming cars. When Su Cheng assembled steaming cars today, I was watching from the side."

Wang Qingyun suddenly widened his eyes and said in surprise: "What? You were watching from the side when Su Cheng assembled? Wouldn't that all fall into your eyes?"

Wang Shengnan nodded and said, "Yes, I saw it all."

Wang Qingyun asked quickly: "Why can you run by yourself without pulling or pushing a steamer?"

Wang Shengnan smiled and explained: "Didn't you tell me the name? I just use steam to push forward!"

Wang Qingyun was still confused when he heard this: "How can steam push the car forward?"

Wang Shengnan explained: "Have you ever seen water boiling? After anyone opened it, the steam can even lift the lid of the pot. This is the principle used, do you understand?"

Wang Qingyun frowned and thought hard. Should he understand now? But why does he still not understand now?

Of course he knew the water had opened the lid of the pot, but what did it have to do with the car moving forward?

I can't figure it out! But it doesn't matter if I can't figure it out, just be fine if my sister can figure it out!

Wang Qingyun said happily: "So, sister, have you mastered the manufacturing method of steaming cars?"

Wang Shengnan couldn't help but give his brother a blank look and said speechlessly: "Do you think I can understand how to build a steamed car just by looking at it?"

Wang Qingyun couldn't help frowning after hearing this. It seemed that he was too optimistic just now. Steaming cars is so magical. How could he know everything just by watching it and how to assemble it?

If that was the case, how could Su Cheng let his sister see it so easily?
Chapter completed!