"Alas!" Xia Hongsheng sighed, changed the hand holding his chin to another one, glanced at the street from a distance, and then let out a heavy sigh: "Alas! ……”

The little guy standing behind him had a panicked look on his face, and his eyes moved around Xia Hongsheng and the street in front of him from time to time: "Gong, Gongzi...... Don't you dare to sit in front of the door, it will make people laugh at the son if you are seen......"

Xia Hongsheng propped his head, sat on the steps in front of his house with a depressed face, his face was sad, he sighed, his eyes looked at the street, he didn't hear what the little guy said at all, but explained without looking back: "Remember to cooperate with me later, and interject that I have been sitting here for an hour since the morning, and I haven't eaten a bite of food, you know?" ”

"Small, small understand...... "The little guy behind him was afraid that someone would pass by on the road in front of the door, and then saw a dignified lord sitting on the top of the doorway.

But seeing Xia Hongsheng flip it in his hand, he took out a soup woman from his sleeve, turned around and handed it to the little guy: "Give, give, take it back, cover it for a long time, sweat." ”

The little guy had just taken the soup woman and handed it to another person, when he saw a few figures turning around at the street corner in front of him, and then he heard Xia Hongsheng hurriedly say: "Remember to interject!" ”

After that, he continued to sigh with his head on his face.

The figures in front of them gradually walked in, and a nest of people from Li Laoer's family came, Li Chengqian, Li Ke, Li Tai, and Li Liqing.

The four of them came closer, and looked at Xia Hongsheng sitting on the steps in front of his house with a depressed face, sighing with a sad face, looking at each other, and seeing Li Ke walking over in front of his head, he asked with a smile: "Hongsheng, what are you doing sitting here?" Why are you sad? ”

There was concern in his tone, but the gloating smile on his face betrayed him.

"Alas!" Xia Hongsheng sighed heavily. He shook his head and didn't speak.

"Jingshi, what's wrong with you?" Li Chengqian also asked.

Xia Hongsheng looked up at them and opened his mouth. But after all, he couldn't say anything, just sighed heavily.

"Young Master Xia, what's wrong?" Li Lizhi walked up to Xia Hongsheng, squatted down with her knees hugged, tilted her head and asked softly.

Xia Hongsheng was stunned. It's so gentle, it's so cute!

So he quickly looked away, Li Lao Er had just warned him.

Li Li raised her head suspiciously, and looked at the little guy behind Xia Hongsheng.

"This ...... The three princes and princesses, my son-in-law doesn't know what's wrong, he has been sullen and sad since he came back yesterday, and he came out early this morning and sat here like this, and he didn't even eat a bite of food. The little guy bowed down and said, "The family doesn't know what's wrong, and they're worried about the son." I sent the little one to guard the son here. ”

Very good, I'll send you a hundred reward money when I go back! Haha, let this little guy come, just take a fancy to his mouth and say!

"What's wrong with you?" Li Tai walked over and asked, "What about the telescope?" ”

Xia Hongsheng suddenly raised his head, stared at Li Tai fixedly, looked directly at Li Tai's eyes, and didn't make a sound, just made a guilty look.

Li Tai was a little overwhelmed by what he saw, looked down at his clothes, and found that he was dressed very well. No problem.

"Li Tai......" Xia Hongsheng's voice was extremely sincere, and there was a strong sense of apology in it: "I'm sorry, I ......"

"You, you, you...... You didn't make a telescope?! Li Tai was suddenly angry, jumped up and shouted, "I specially called the eldest brother and the third brother to come!" ……”

"It's not. Of course I did! Xia Hongsheng waved his hand: "It's just ......"

Li Tai's expression tightened: "Just what?!" ”

Xia Hongsheng's face changed to the apologetic look with a sad face, sighed, and said, "Alas! …… It's just that I didn't protect it well......"

"What?!" Li Tai's face darkened.

"I made it the evening of the day you handed it to me. Yesterday, I took it to the army to see the effect, and it happened to meet Uncle Cheng who went to inspect the army, and then ......" Xia Hongsheng stared at Li Tai faintly. Said: "Alas! When Uncle Cheng left, he said that he would check for you first, play for two days, and let you ask him if he wanted to go! ”

Xia Hongsheng sighed again, and the four children of Li Lao Er looked at each other, not knowing what to say.

"Cheng Laopi...... Whining! ......" Li Tai gritted his teeth, but before the words in his mouth came out, he was covered by Li Chengqian.

After a long while, Li Tai finally struggled out, suddenly twisted his face, stared at Xia Hongsheng and asked, "Could it be that you didn't do it, so you deliberately said this to deceive us?" ”

"Just a telescope, as for it?" Xia Hongsheng waved his hand: "I don't believe you can ask Qi Yong, or go to the barracks to ask, Ma Zhou used a telescope to see it yesterday." ”

"What then?" Li Tai asked.

Xia Hongsheng shook his head: "There is no way." Yesterday I heard what they said, and I thought they would give it to His Majesty. ”

"Huh?!" Li Tai's face suddenly turned ashen, and he lowered his head in frustration.

Xia Hongsheng looked at Li Tai's appearance and felt a little guilty, so he patted him on the shoulder and said, "It's okay, it's just a telescope." Don't worry, after the glass is burned on my Zhuangzi, I will make you a more transparent and farther binoculars! ”

"But......" Li Tai was very sad, what he had been waiting for for a long time was finally made, but before he could take a look, he was snatched away by others.

"Manly husband, be lenient!" Xia Hongsheng patted Li Tai on the shoulder again and said, "There are many interesting things in this world, and the telescope is only one of the insignificant. Broaden your mind and enlarge your horizons, although a telescope can make people see far away, but it is not a great thing. ”

Li Tai listened to Xia Hongsheng's words, rolled his eyes, and suddenly asked, "Then you have something even more amazing?" ”

"It's too much." Xia Hongsheng raised his chin, looking like he was the only one in the sky and on the ground, and said.

"Then we can't run for nothing today, you can let me see a more amazing one!" Li Tai laughed and said. Xia Hongsheng was happy in his heart, this little Zhengtai still knows how to set himself, okay, isn't it just some small means, as long as it can stimulate Li Tai's curiosity about these things, cultivate Li Tai's interest in science since he was a child, and let him devote his energy to scientific research when he grows up, instead of that position, it will be worth it.

So Xia Hongsheng smiled and asked, "Have you ever seen iron?" ”

"Isn't that nonsense!" Li Ke rolled his eyes.

Xia Hongsheng grinned: "I can make the iron float on the water." ”

In the main hall of Xia Hongsheng's Chang'an mansion, a bowl of water was placed on a table in the middle. Xia Hongsheng and the four people of the Li family formed a circle, and everyone stared closely at the things in Xia Hongsheng's hand.

"It's a needle, it's made of iron, isn't it?" Xia Hongsheng raised his hand, pinched the embroidery needle in his hand, let everyone look at it, and then handed it over: "Here you go, you all try it." ”

The four of them looked at each other, and then Li Lizhi took the lead in taking the needle, and asked a little embarrassedly: "Young Master Xia, what should I do next?" ”

Xia Hongsheng pointed to the bowl on the table and said, "See this bowl of water, put the needle in it." ”

Li Lizhi nodded, put the needle up, and naturally, it sank to the bottom all of a sudden.

Fishing out the needle, Xia Hongsheng smiled and said, "Look! ”

Then, I saw Xia Hongsheng gently put the embroidery needle horizontally, two fingers gently against the two ends of the embroidery needle, and then slowly approached the water surface in the bowl. Everyone gasped in amazement, and the needle did not sink to the bottom, but just floated to the surface of the water in the bowl!

"You, how did you do that?" Li Ke was taken aback.

"I'll try!" Li Tai reached out and took the needle, and then followed Xia Hongsheng's example and put the needle horizontally on the water, but the moment Li Tai let go, the needle immediately sank to the bottom.

Li Tai didn't believe in this evil, and tried again and again with the needle, but he still couldn't get the iron needle to sink on the water.

"Why is that?" After a long time, Li Tai finally gave up his attempt, turned his head to Xia Hongsheng and asked.

Xia Hongsheng was about to speak, but suddenly his heart moved, and he thought of another question. So he smiled and said, "Look at the boats on the river on weekdays, why can they float on the water?" In fact, water also has a kind of power, I call it buoyancy, if the buoyancy exerted by the water on the object on the surface of the water is greater than the weight of the object itself, it can hold up the thing and prevent it from sinking to the bottom. ”

The embroidery needle floats on the water, of course, not for this reason. What keeps the embroidery needle floating on the water is not buoyancy, but surface tension. But just now Xia Hongsheng's heart suddenly moved, so he deliberately said that it was the reason for buoyancy, and there were other purposes.

"Then according to you, if the buoyancy of the water is big enough, not only this embroidery needle, but even a bigger thing can float on the water without sinking to the bottom?" Li Tai asked curiously.

"Of course." Xia Hongsheng nodded and said, "If you can get me enough steel, I can also use steel to make you a ship!" ”

Seeing Li Tai's eyes light up, Xia Hongsheng knew that Li Tai had taken the bait again.

You can't do it in a big boat, but you can still sit in a small boat for two people. The small boat is made, and there are so many shipbuilders in Datang, there will always be a few smart ones who will slowly make up the big boat.

To the west, it is much more convenient to sell things and open a trade route, and it is much more convenient to take the sea route than to take the land route.

It seems a little far away! If you want to develop the marine industry, you have to wait until Datang has calmed down all the things around the land before you can really start to put it on the table.

However, of course, the seeds should be planted as early as possible. (To be continued.) )