"The second longest river in the world is called the Amazon River, located in the distant America, and the number one is the Nile River, located in the same distant African continent!" Li Xiu said with a smile. Li Xiu was also very satisfied with Li Chengdao's cooperation. Now he actually felt a little cute when he saw him.

"Where is America and where is Africa?" Li Chengdao asked again like a curious baby. He was full of curiosity and was full of curiosity about everything unknown.

"Africa is located in the southwest of our country. It takes thousands of miles to reach it. Of course, you can also take the sea route. It is also the hometown of Kunlun slaves. As for America, it is located in the extreme east, which consists of two continents, north and south. The Amazon River is located in the northern part of South America." Li Xiu explained patiently again.

"It turns out that Kunlun slaves live in Africa. I heard that they are all a group of uncivilized savages, and they are even in an era of eating raw meat and drinking blood. I wonder if this is the case?" Li Chengdao was also interested in Li Xiu's words at this time, and asked with great enthusiasm again.

"This is not comprehensive. Central and southern Africa are indeed a group of uncivilized savages. However, in the northern part of Africa, the lower reaches of the longest river Nile, there is a very long ancient civilization. The ancient country is called Egypt. When our ancestors were still under the rule of the Three Sovereigns and Five Emperors, Egypt had already established a unified country. Their rulers were called Pharaohs, and they believed that as long as the body did not rot after death, they would be resurrected in the future. Therefore, before Pharaoh lived, he would build a tomb with the strength of the whole country. It was extremely large in scale. From the outside, it looked like the word "gold" in our Chinese character, so it could be called a pyramid..."

In order to show his own experience, Li Xiu briefly explained the ancient Egyptian civilization. As a result, Li Chengdao's eyes were staring. Although these history sounded like a night talk, Li Xiu's speech was reasonable and not as if it was fabricated. Moreover, there were too many things he had never heard of and thought about, so he was fascinated by listening for a while, and his impression of Li Xiu had also changed greatly. It seemed that it was not unreasonable for the other party to be valued by his aunt.

Princess Pingyang used to know that Li Xiu was very knowledgeable, but she didn't expect that he knew so clearly what was happening thousands of miles away. It was fine if she had heard about Li Xiu before, but it was the first time she heard about Africa and Egypt, which made her very curious. At Li Xiu's age, where did he learn these things?

After finally waiting for Li Xiu to finish his speech, he felt a little dry mouth. However, when he saw Princess Pingyang's surprised expression, he couldn't help but smile with satisfaction. However, at this time, Li Chengdao suddenly shouted: "Li Jijiu, what you said is so wonderful. I still have many unsolved questions to ask for, I wonder if you can help me answer it?"

When Li Chengdao said these words, his big eyes also flashed with some unknown desires, and there was a bit of admiration in it, which made people really unable to refuse. However, Li Xiu said that these were actually for Princess Pingyang to listen to, and he wanted to spend more time with Pingyang, but he really didn't want to waste time on this little kid, so he showed a little hesitant expression for a while.

"Li Jijiu, Daoer is usually very busy with his studies, and it is rare to have something that he is so interested in. Why don't you just explain it to him? I'll go play with Qi Niang!" At this time, Princess Pingyang also spoke for her nephew. Speaking of it, since she came in just now, Qi Niang has not come over, but sat there as if she was playing with something, which made her very curious. You know, Qi Niang was very attached to her in the past, but what happened today?

Seeing that Princess Pingyang also pleaded for Li Chengdao, Li Xiu couldn't refuse anymore, so he had to nodded and agreed. This made Li Chengdao cheer happily, pulled Li Xiu and ran to the pavilion not far away to sit down. Then he explained his questions about Egypt with a wise mind. Li Xiu had to answer one by one. After finally answering it, he didn't expect that Li Chengdao actually started asking questions about America again, which would not allow him to breathe at all.

At the same time, Princess Pingyang also walked towards Qi Niang with curiosity. When she came in just now, Qi Niang just smiled and said hello to her, and then lay on the grass and looked at something seriously. When Princess Pingyang approached, she realized that there was a small shelf in front of Qi Niang, with a transparent thin slice on it. I don’t know if it was made of water jade or medicine jade? In addition, there was a ball of turquoise under the shelf, and I don’t know what she was doing?

"Qinniang, what are you doing?" Princess Pingyang sat next to Qiniang holding her skirt and asked softly.

"Sister Xiuning, this is an experiment done by my brother. He said that only this crystal lens can ignite the turquoise below. I don't believe it, so I kept guarding it like this." Qi Niang turned her head and said softly, as if she was afraid that the voice would be too loud and would lead to the failure of the experiment.

"How is this possible with only this lens to ignite the turtle velvet and it remains unmoved?" Princess Pingyang couldn't help but scream in surprise when she heard this.

"It's really OK. Sister Xiuning, just try putting your hand under the lens!" Qi Niang said as she pulled Princess Pingyang's hand on the light spot under the shelf. As a result, Princess Pingyang immediately felt a little burning on her hand. She couldn't help but pull her hand back, touched the back of her hand but there was nothing. Then she put it back in confusion, and found a light spot on her hand. Wherever the light spot shone, there was a burning heat.

"Strange, what's going on?" Princess Pingyang asked with a puzzled look at the light spot under the lens.

"Hehe, it turns out that Sister Xiuning doesn't know either, but I heard from my brother that this crystal lens can gather sunlight to a point, thereby generating a very high temperature, so that the turquoise can be ignited. Let's know if this is the case later!" Qi Niang didn't know when she saw Princess Pingyang, and said happily at the moment, as if she was happy to have another companion.

Princess Pingyang was also curious at this time. She stared at the light spot under the lens with Qi Niang. Because Qi Niang had been waiting for a while before, Princess Pingyang didn't wait too long. So soon she saw that tinder below began to appear, and then Mars began to appear, and finally it actually started to burn.

"It's really burning. It turns out that what my brother said is true!" Seeing the burning turquoise, Qi Niang couldn't help but jump up happily and shouted.

Princess Pingyang was surprised to pick up the lenses on the shelf and carefully observed them. However, after looking at them for a long time, she didn't find any mystery. She just found that the lens was thick in the middle and thin around. Is this related to lighting the tinder?

"Sister Xiuning, there are many different lenses here. My brother just now taught me some other ways to play. Come and take a look!" At this time, Qi Niang suddenly stood up and ran to the side and shouted. Princess Pingyang walked over curiously, but found an open small box on the ground with some polished lenses in it.

Qi Niang reached out to take the lenses from Princess Pingyang's hand, then picked out one from the box, and placed them in front of her eyes one after another. As a result, she immediately made a "giggle" laugh and began to look around. Finally, she suddenly stopped in a certain direction and shouted happily: "Sister Xiuning, look, there are a few sparrows fighting on the tree!"

"Where?" Princess Pingyang also turned her head and looked, but except for seeing a forest in the distance, she didn't see any sparrows. What's more, even if there were sparrows, it was impossible to see such dense forests.

"It's true, Sister Xiuning, look!" Qi Niang pulled Princess Pingyang down at this time, then placed two lenses in front of her eyes and asked her to close one. As a result, Princess Pingyang did not expect that the scenery in the distance seemed to be pulled closer, and everything became very clear in front of her eyes. And it was indeed as Qi Niang said, there were really a few sparrows fighting on the trees in the distance.

"This... is this a spell?" Princess Pingyang saw this magical scene and immediately covered her chest with a little unbelievable. Apart from the legendary spell, she really couldn't think of anything that could achieve this effect?

"Hello~, Sister Xiuning is the same as me. At first, I thought my brother could do magic, but later my brother told me that this is called a telescope. In the future, just use a barrel to fix these two lenses and you can use them to observe the situation in the distance." Qi Niang smiled again. At a young age, she just thought the telescope was very interesting and did not realize its real function.

"Typescope? Telescope! If every general can equip a telescope, wouldn't it be possible to discover the enemy situation in advance?" Princess Pingyang was excited at this time. She was a general, so she was naturally the first to think of the role of the telescope in military affairs.

When she thought of the military role of the telescope, Princess Pingyang could not help it anymore. She walked over quickly and wanted to confirm the function of the telescope to Li Xiu. However, when she came outside the pavilion, she suddenly saw Li Xiu talking in a spirit. The young Li Chengdao held his cheek with both hands, and listened with intoxication. From time to time, there would be a hint of understanding on the corners of her mouth.

Seeing this warm scene, Princess Pingyang couldn't help but feel soft and her steps could not help but relax. She almost treated Li Chengdao as her own child. She usually felt sorry for his heavy schoolwork. Now she finally had the opportunity to relax, which made her unable to bear to interrupt them.
Chapter completed!