Li You was also a little excited, and he said: "Father, this is just the beginning, the 10-wheeled carriage you just mentioned can only transport 5,000 catties of goods. Erchen plans to build a transport vehicle in the next step, which can transport thousands of people at a time and transport more than 100,000 catties of goods. ”

As soon as Li You's words fell, everyone immediately showed a look of disbelief, although Li You's prestige was extremely high, but what he said completely subverted people's imagination.

Emperor Fu Rui, the secretary of the Ministry of Works, asked: "Your Highness, I'm afraid this thing can't be done, how many horses do you need for such a big carriage?" And how big do you have to build? You can't run off the road, can you? ”

Including Li Shimin, they all feel that Li You is a little unreliable this time.

Next, Li You said something even more shocking. He said: "Father, this kind of vehicle doesn't need to be horse-pulled, it will run by itself." ”

"What? How is this possible? There was a lot of talk.

Li Yougang wanted to talk to everyone about the steam engine and the train, and suddenly found that what he said was indeed a bit unreliable, because everyone is used to seeing is believing, just like the four-wheeled carriage in front of them, and it is a bit too early to say that the steam engine and the train are too early.

He smiled and stopped talking.

At this time, Wei Zheng said: "Your Majesty, the minister believes in His Royal Highness the King of Qi. ”

Li Chengqian said: "Father, the emperor, the son believes in the fifth brother. ”

"The minister believes in His Royal Highness the King of Qi." Gao Jingming said.

"The minister believes in His Royal Highness the King of Qi." Hou Junji said.

"The minister believes in His Royal Highness the King of Qi." Everyone said.

Although Li Shimin felt that what Li You said was too weird, his son had said a lot of outrageous things before, but everything was unbelievably realized.

He said, "Well, I also believe in Li You. ”

Li You was a little moved in his heart, it was a very important and honorable thing to be trusted, and he also felt that it was time to study the steam engine and the train. In order to live up to everyone's trust, he decided to popularize the knowledge of steam engines to everyone.

He said, "Father, have you seen the boiling water on the stove?" ”

Li Shimin nodded and said, "Is this related to what you said?" ”

Li You said: "When boiling water, the steam inside will lift the lid of the kettle, which means that when the water is heated, it will turn into steam, and the steam will generate power, so it can lift the lid of the kettle."

What I'm talking about is inventing a machine, and that machine is using this principle. The water in the machine is first heated by coal combustion, and then the resulting water vapor is applied to the wheels to propel the vehicle forward, this kind of machine is called a steam engine. ”

"I see, it makes sense." Everyone is the elite of Datang, although they don't know what the specific working principle is, but they all think it is feasible to use the power generated by water vapor to propel the wheels forward.

Li You said: "Father, the power of the steam engine is very great. We make a steam engine into a locomotive, and use it to pull the carriage instead of a horse, which can pull tens of thousands or even hundreds of thousands of catties of weight, and such a vehicle is called a train.

The train is a special vehicle that needs a special road, which is to lay two parallel rails on the ground, and the wheels of the carriages run on the rails, so that a car can pull dozens of carriages and carry thousands of people or hundreds of thousands of pounds of goods is not a problem. ”

"That's right, it's going to work." Everyone said they understood.

Li Shimin was very interested, and he said: "This matter is too important. The crown prince, Li You, Fu Ji, Xuan Ling, Hou Junji, Li Jing, Gao Jingming, and Huang Furui went to the Liangyi Hall with me to study the matter of this train in detail. ”

"The ministers obey." The people who were called said in unison.

Liangyi Palace.

After studying the matter of the train, Li You was going to go to the East Palace with Li Chengqian to study the transportation of grain and grass, and Li Chengqian still had some things that Li You needed to coordinate.

As soon as the two of them came out of the Liangyi Palace, they saw Hai'an, the personal palace maid beside Empress Changsun, waiting at the door of the main hall.

"The slave maid has seen His Royal Highness the Prince, His Royal Highness the King of Qi." Haian saluted and said.

Li Chengqian asked, "Hai'an, is there something wrong?" ”

"His Royal Highness the Prince, the Queen Mother invites His Royal Highness King Qi to come over." Haian said.

Li Chengqian said: "Fifth brother, the queen mother asked you to go over, so you can go first." After finishing the business, come to the East Palace, I will prepare a banquet for you, and our brothers will have a few drinks. ”

"Big brother, then I'll go first." Li You arched his hand and said. Although Li Chengqian is close to Li You, Li You has never lacked courtesy to Li Chengqian.

On the way, Li You didn't ask Queen Hai'an why she was looking for herself, and he guessed that it must be related to Gu Ruoyu's matter.

Hai An said: "Your Highness, Princess Wu heard that there are a lot of new cosmetics, that kind of perfume, can you sell a bottle to the slave maid cheaply?" "The perfume invented by Li You is currently not in large production, and only top aristocratic women can use it, and Hai An saw that the queen mother used it, and also wanted to have a bottle to try.

Li You smiled and said: "What a big deal, if you want it, I will send someone to send more to the queen mother when I go back, and bring some to you by the way." This perfume has different smells, I will give you a bottle of each, you can try which one you like best, and I will send someone to give it to you again in the future. ”

"Slave, thank you, lord." Haian said in surprise.

Lizheng Palace.

"Sons and daughters, see the queen mother." Li You saluted and said.

At this time, the son-in-law, who was playing beside Empress Changsun, saw Li You, ran over happily, stretched out his little hand and said, "Fifth brother, where is my gift?" ”

Li You squatted down, took out a bamboo dragonfly from his arms, and said to her: "Look, this is called a bamboo dragonfly, like this." With that, he gave her a demonstration.

The bamboo dragonfly flew in the wide nave, and the son clapped his little hands excitedly, jumped and shouted, "Okay, it's fun." ”

Empress Eldest Sun has been looking at her son lovingly, until she saw her pick up the bamboo dragonfly, and then smiled and said, "Okay, son, the queen mother wants to talk to your fifth brother, you go outside to play first." ”

The son saluted sensibly and said, "Yes, Queen Mother." After speaking, he followed Hai'an out.

Empress Changsun said to Li You: "Come, You'er, sit here." ”

"Thank you, Mother." Li You walked to the sofa on the side of Empress Eldest Sun and sat down.

Empress Eldest Sun peeled an orange for Li You with her own hands, handed it to him, and said, "Gu Ruoyu, you can tell me about it carefully." ”

Li You told Empress Changsun in detail what happened, he didn't hide it, and even the part of the matter involving Li Yuanji truthfully explained to Empress Changsun in detail.

Li You didn't reveal this matter to his mother, but told the eldest grandson queen, which is a deep level of trust.

Concubine Yin is just a woman, with maternal love and compassion. Empress Changsun is not only a woman, she is also a woman with superb political wisdom, she does not interfere in politics, does not show the dew, but uses her gentleness and delicacy to quietly influence Li Shimin.

Empress Eldest Sun was silent for a long time, thinking all the time. Li You was silent and waited silently.

Empress Eldest Sun's first feeling was the same as when Li You and the others learned about it, thinking that it was enough to take care of Gu Ruoyu secretly, and there was no need to mention this matter again. However, things are already like this, and she no longer said that Li You should discuss with her in advance, and should not act recklessly Those useless words, she is thinking about how to make Li Shimin accept this matter.