"Nonsense, how can two iron balls, one big and one small, fall to the ground at the same time? The large iron ball is heavier, so of course it will fall to the ground first!" Li Shimin sneered.

Li Zhi scratched his head and said, "Father, my son-in-law thought so at first, and everyone thought so. Later, my brother-in-law took us to verify it personally and loosened two iron balls at the same time on the high ground. As a result, two iron balls, one big and one small, actually landed at the same time!"

Empress Changsun exclaimed softly: "Does it really land at the same time?"

Li Shimin said decisively: "This is impossible!"

"Really, Father, it's true. My son saw it with his own eyes. If you don't believe me, please ask the fourth brother, and the fourth brother has also seen it with his own eyes!" Li Zhi insisted.

Empress Changsun's eyes froze and said with a smile: "If Your Majesty doesn't believe it, that's not simple. Let's verify it, wouldn't it be fine?"

Li Shimin snorted: "Customize it and verify it, I don't believe it. Two different iron balls can still land at the same time!"

"Go and find two iron balls of different sizes!"

"It must be honest!" Li Zhi instructed.

Li Shimin, Empress Changsun, and Li Zhi stood in front of the tall building. Even Princess Changle and Princess Yuzhang rushed over after hearing about it. Obviously, they were very curious about it.

Two iron balls fell from the air, and everyone's eyes stared at them without blinking.

"Ye! It landed at the same time, father and mother, have you seen it? It landed at the same time!" Li Zhi jumped up happily.

Queen Changsun exclaimed: "It's really hard to believe that it really landed at the same time!"

Li Shimin was so unwilling that someone had tried it a few more times, and had to admit in disappointment that two iron balls, one big and one small, did land at the same time.

"Why is this?" Li Shimin couldn't figure it out.

Li Zhi began to explain with a flash of elegance.

Li Shimin and Empress Changsun were both fascinated by it.

"My brother-in-law also said that we will talk about atmospheric pressure in two days. He said that although we can't feel it, we are actually surrounded by air, and the air also has pressure. He also has to conduct a large-scale experiment and sent a lot of invitations, asking everyone to watch the ceremony. Mother, this is your invitation!" Li Zhi said excitedly.

It is said that it was a large-scale experiment, and it was exciting to think about it.

After handing the invitation to his mother, Li Zhi suddenly looked at him with a scorching gaze. He turned his head slightly and found that the gaze was from his father.

At this time, Li Zhi suddenly remembered that only his mother had an invitation, but his father had no invitation!

My brother-in-law didn't forget it, right?

No, this must have been intentional!

It's so exciting!

Li Zhi swallowed nervously, shrank his neck and became an ostrich.

When Li Shimin saw Li Zhi's appearance, he knew that Su Cheng had not prepared an invitation for him. He was so depressed that he almost vomited blood!

Since you want to watch the ceremony, how can you lose the emperor as him?

As a result, Su Cheng didn't give him the emperor's invitation!

Spicy!

He was really curious about what experiment Su Cheng was going to conduct, and even invited so many people to watch the ceremony.

However, when he thought that Su Cheng hadn't invited him at all, could he go?

Of course, no one dared to drive him out after he went, but did Li Shimin want to save face?

Empress Changsun was very hesitant when she held the invitation. Of course, she wanted to go, but the emperor did not have the invitation.

She complained deeply in her heart that she was such a slut. It was a good opportunity to ease the relationship with the emperor, but Su Cheng refused to give the emperor an invitation.

Where does this put the emperor's face?

Li Shimin snorted angrily: "If the queen has time, go and see what that kid is doing. I'm busy!"

The people of Chang'an did not understand experiments, so this incident did not cause any response in Chang'an. However, on that day, Su Cheng's village was very lively.

Almost all the nobles in Chang'an have come, and some people are shameless when they have not received invitations, such as Prince Li Chengqian and Du He.

They have also been paying attention to Su Cheng, but they are not interested in so-called mathematics and other things. Is that thing useful for governing the country?

When Li Tai and Li Zhi came to learn from Su Cheng, Li Chengqian even sneered. Li Tai really didn't even want the prince's face!

Prince Li Tai can be shameless, but he, the prince, has to be shameless!

But he came today, not because he was interested in Su Cheng's experiment, but because all the nobles in Chang'an City came!

But the emperor did not come, nor did Empress Changsun come.

Empress Changsun suddenly felt unwell and was unable to come.

Su Cheng didn't care, Li Zhi and Li Tai were also here. What disappointed him was that Princess Changle did not come.

"Hey, this tea is not ordinary today!" Changsun Wuji said in surprise.

Cheng Yaojin picked up the tea and drank it, smacked his lips and said, "Well, it's quite fragrant!"

"What a cow chews peonies!" Li Ji shook his head and sighed.

"Boy Su, Boy Su, what kind of tea is this?" Yuchi Gong asked loudly.

"This is the best Mingqian Longjing, very rare, not even in the palace. If anyone can pull this bronze ball away today, I will give him a pound of Mingqian Longjing!" Su Cheng smiled with two half-balls thrown in his hands.

Everyone asked curiously: "Isn't this apart? Why are you trying to stick it up?"

Su Cheng smiled and explained: "It's not sticking, it's just putting it together, and then pulling out the air inside."

Everyone surrounded him and watched Su Cheng tinker with curiosity.

"Okay!" Su Cheng clapped his hands and smiled.

Cheng Yaojin asked in confusion: "That's it?"

Su Cheng nodded and said, "That's it, whoever can pull it open will give me a pound of Mingqian Longjing!"

If you pull it open, you will get the best Mingqian Longjing? Who can't pull it open?

Cheng Yaojin immediately laughed and said, "I'll do it! I'll do it!"

Yuchi Gong shouted: "You go, I'll come, I'm strong!"

Su Cheng smiled and said, "No need to rob, no need to rob, anyone can try it. As long as I can pull it open, I will give you a pound of Mingqian Longjing, and I will never go back on my word!"

Even the steady Fang Xuanling and Wei Zheng were very moved. This Mingqian Longjing was really attractive.

Cheng Yaojin grabbed the copper ball with one hand, and then started pulling it with both hands, but the copper ball did not move at all.

He still didn't believe it! Cheng Yaojin shouted loudly, exerting all his strength, his face soared and purple, but the copper ball still showed no sign of being opened.

Yuchi Gong couldn't help laughing and said, "What's wrong with you, Lao Mo Cheng? What's wrong with you? Did you use all your strength to women? Hahaha!"

"You come, I don't believe you can pull it!" Cheng Yaojin threw the bronze ball to Yuchi Baolin. He felt that this thing was really evil.

Yuchi Gong took the bronze ball, looked around and laughed, "Let you see what strength is!"
Chapter completed!