After seven years of fiefdom, Li Shimin asked me to return and become the crown prince.

"Li Kuan agreed to offer his papermaking technology?"

Li Shimin read the letter again, in which Li Daozong briefly described his experiences these days.

Going out to sea? Hunting whales?...A fish weighs hundreds of thousands of pounds?

Is it true?

When they come back, I must ask them clearly.

"Give me a bowl of rice porridge, I'm hungry!"

He has had a poor appetite these days, but after hearing this news, he suddenly felt hungry.

"Your Majesty, this hot pot is really good, spicy and delicious, and the sesame paste is delicious too!"

Compared to Li Shimin drinking rice porridge, Cheng Yaojin was eating beef hot pot with mutton and whale meat, and was amazed.

The taste was so fragrant.

Suddenly, I felt that I had lived in vain for most of my life.

Li Daozong also nodded silently, it was delicious, especially the spicy feeling in the mouth, it was really refreshing

"If it tastes good, eat more!"

Li Kuan also picked up some meat and started eating. Lingnan is hot and humid, and people need to eat something spicy to get rid of the moisture in their bodies. This is the same even in later generations.

However, the taste of this dogwood is still far inferior to that of chili peppers.

It seems that his plan to go to South America should be implemented as soon as possible.

The three of them had a good meal, and Li Kuan saw Cheng Yaojin and Wang Xiqing off.

"Your Highness the Prince of Chu, you have a broad mind and are able to give up the new papermaking technique!"When leaving, Li Daozon held Li Kuan's hand with tears in his eyes, very excited.

As a prince, he knew that Li Shimin's life was not easy. The aristocratic families controlled most of the officials in the court by relying on their writing. Every time Li Shimin made a decision, the aristocratic families would sing the opposite tune.

As long as there is something that harms the interests of the aristocratic families, then the government orders will be difficult to implement.

With cheap paper, the royal family can cultivate their own children from poor families, and they also have a trump card to compete with the aristocratic families.

Li Kuan sighed and said generously:"I left Chang'an when I was young and came to Lingnan for seven years. I have not made any contribution to the Tang Dynasty in these years. Now that the court needs me, I will naturally do my best!"

Li Daozon listened to Li Kuan's words, his eyelids twitched.

How did he say such arrogant words? Damn, if he hadn't come to Lingnan, he would have believed it.

"His Royal Highness the King of Chu is righteous!" Although he knew that Li Kuan was speaking against his conscience, he still gritted his teeth and nodded in praise.

""Your Highness, Prince of Chu, can I come back often?!" Wang Xiqing's face was drooping to the ground, full of sadness.

He really didn't want to go to Chang'an. It would be great to stay in Lingnan.

"Go with peace of mind. When the factory you built in Chang'an is stable, you can come back whenever you want. Lingnan will always be your home!" Li Kuan patted his shoulder and comforted him kindly.

""Your Highness, I'm going!" Wang Xiqing nodded solemnly, with a desolate look.

Cheng Yaojin and Li Daozon just watched quietly. Is Chang'an City so scary? Wang Xiqing was as heartbroken as if he was going to die.

Li Kuan said goodbye to these people, and Wang Xiqing left with tears in his eyes.

"Your Majesty, just now the military workshop sent someone to inform us that the hot air balloon has been made and is preparing for a test flight!"Zhao Xin came over and whispered in Li Kuan's ear.

The hot air balloon is ready?

Li Kuan's eyes lit up. How could he be missing from such a great moment of test flight? He might miss the title of the first person to fly.

"Let's go to the military workshop!"Li Kuan waved his sleeves and rode towards the military workshop.

The military workshop was in a valley 30 miles outside Lingnan City. Outside the military workshop was one of Lingnan's military camps, which was under strict guard.

Zhao Xin led the way with the token of the King of Chu's Palace. When he entered, he saw a solid and magnificent small city.

Gongshu Ziyu and a few old men were waiting outside and bowed to greet him.

"Is the hot air balloon ready?" Li Kuan asked after he asked several people to stand up.

Gongshu Ziyu nodded and took Li Kuan to a spacious courtyard.

There was a large hanging basket in the courtyard. There was a stove in the hanging basket and a blower next to it, but it needed to be pulled hard.

Next to the hanging basket was a huge ball made of whale skin.

""Let's get started!"

Li Kuan didn't hesitate, looking at the hot air balloon with some heat in his eyes.

After receiving Li Kuan's order, Gongshujia first directed people to use a large pedal-type blower and fire to blow up the whale skin ball, and then ignited the stove below.

The stove was burning with whale oil mixed with coal. This kind of fuel burns for a long time and the fire is much more fierce than ordinary coal.

When the bellows were pulled, the flames sprayed two or three meters into the sky. After a while, the hot air balloon was filled with hot air and slowly floated up.

Because of the cable pulling, the hot air balloon hovered at a distance of one foot from the ground.

"Can this really fly?"

Zhao Xin looked at the suspended hot air balloon and swallowed his saliva.

However, the shock was only for a moment and then he was relieved. Following the prince, there would be no miracles.

Under their shocked eyes, Gongshu Ziyu was the first to step into the hanging basket. He was very confident in the hot air balloon he made.

"Do you want to go up and take a look?" Li Kuan glanced at Zhao Xin and asked calmly.

""Your Highness, this is a new research product. I think I'd better not go!" Zhao Xin hesitated.

Li Kuan shook his head and stepped into the hanging basket:"Just let the rope go for more than a hundred meters. I'm afraid of heights if it's longer!"

"My Lord, you.."Zhao Xin hurriedly tried to stop him.

Li Kuan shook his head and said,"If Ziyu dared to go up, why can't I?"

As he spoke, he pulled the eight thick ropes that held the hanging basket, which were very strong.

He knew hot air balloons well, and with ropes pulling them, they were actually large parachutes, and there was no danger.

"etc....I’m going too!" Zhao Xin gritted his teeth and stepped in.

Da Niu followed him:"I want to go to heaven too!"

""Don't come up, Daniu, you're overweight!" Li Kuan waved his hand to stop Daniu from coming in. They already had enough people, and Daniu, who weighed nearly 300 kilograms, couldn't fly at all. After comforting Daniu, he said to the people next to him,"Release the rope!"

After receiving the order, the people below slowly loosened the rope, and the hot air balloon slowly rose, and gradually the houses below became smaller.

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