Leaving Zhangjia Village, Li Ke and the others drove north, all the way to the Hetao area of Datang, which is also one of the most important grain producing areas in Datang.

The abundant water system here has made it one of the modern watered lands of the Tang Dynasty, but unlike Li Ke's former hometown, the population here is not so large, and like the Northeast Plain, it is also a typical representative of large-scale mechanized planting.

It also became an important horse breeding ground in the Tang Dynasty, and the Ningxia line down the Yellow River did not become a desert like in later generations.

Because the Mu Us Desert did not appear, the Helan Mountain Range blocked the desert and fertile soil, and almost all the east of Helan Mountain was a large area of dense forest, and along the way, Li Ke found it hard to believe that this was once part of his hometown.

Just like the city of Wuhai, in Li Ke's life, it can almost be said that it is a city that is very unsuitable for human survival, coal mines, deserts, etc., so that it is eroded by wind and sand all year round, and the sky feels yellowish for most of the year.

But now, although the coal mines are also mined, the green environment is very good, so it is still like a forest city.

Continuing along the Yellow River, crossing the Yinshan Mountains, when Li Ke entered Hanhai Prefecture, the surrounding mountains were already full of vast grasslands.

In Li Ke's previous life, the western part of the Mongolian Plateau had been completely desertified, and in order to control the sandstorms, the country had managed the Mu Us Sandy Land, the Saihan Dam, and most of the Kubuqi Desert, but the sandstorms still could not be extinct.

Because the source of the sandstorm has changed, the sand and dust that once came from China has been replaced by Mongolia, which is the helpless place.

Because the wind and sand will not end because of national borders, but there is no way to stop things in other countries.

But in this life, because Xihanhai Prefecture became a nature reserve early, although there are also herdsmen in it, but the herdsmen's breeding efforts are limited to a very low level, so the appearance of grassland is still retained here.

The thousand-year-old protection has allowed the grassland to be maintained here, so the current Datang can see a sandstorm...... That's really a lot of people are excited, and they see it as a rarity.

And when the vehicle entered Hanhai Prefecture, Li Ke saw the seven wonders of the world, the Great Wall of Gravel.

The real Great Wall of China, on one side of the road, is piled up with countless gravel piles to form a long, about three or four meters high gravel wall, which has been accompanying all the roads on the entire grassland.

The entire length of this gravel Great Wall is about 32,320 kilometers, and it can be seen everywhere in the grasslands of Hanhai Prefecture.

And by now, it has become the spiritual symbol of the entire grassland people, and on both sides of this great stone wall, you can often see some small Ao Bao piled up, which are hung with different colors of Hada.

Although Li Ke encountered this back then, when more than 1,400 years later, it really became a world wonder, Li Ke was still extremely emotional.

When you drive a car and look at it, it is not shocking, it looks like it is just a stone wall formed of gravel, but when you know that it is formed by countless grassland people who have picked up some small stones from the mountains on the grassland for more than 1,400 years and moved them over little by little, then you can understand the shock!

There is no Great Wall in this world, but it also has a different Great Wall! A Great Wall made of people's hearts! Perhaps this is the reason why countless people on this grassland have not changed their beliefs for thousands of years.

Li Ke silently watched these gravels continue to stretch, he had no chance to come to this Hanhai Prefecture, the vast grassland on both sides is like a green carpet constantly stretching away, and in the distance, you can see a lump of cattle and sheep walking and grazing on the grassland.

Those white yurts are still made in the shape of yurts, of course, there are no yurts in this world, they are still called yurts.

It was as if it was in stark contrast to the technologically advanced Tang Dynasty, and there didn't seem to be much to see in this land, until Li Ke arrived at a city that was not considered ancient.

Datang Dongfeng Aerospace Landing City, this city is not big, or it used to be the recovery base of Datang manned spaceflight.

However, with the development of science and technology, the current Datang manned space landing has been extremely accurate, and the recovery base here has been gradually abandoned, after all, the dimension here is too high, and the energy efficiency ratio as a space launch recovery base is not very high.

Anyway, there are many suitable launch bases in Datang, and this place is naturally gradually abandoned.

But although it was abandoned, it was the starting point of the entire Datang aerospace development, so it has now become a tourist city.

Aerospace is not influenced by Li Ke, so many of them are unfamiliar to him, he took his little assistant to visit here with great interest, and then started a wave of live broadcasts by the way.

And here, for tourism, there are still several once intact recovery pods.

Entering the aerospace museum set up here, Li Ke looked at it with interest, but what Li Ke didn't expect was that he thought that this had nothing to do with him, after all, Datang's first satellite was launched in Datang 997, more than 400 years ago.

It is even farther away from Li Ke's era.

"Liu Ying, the founder of Datang's aerospace industry, the winner of the Datang National Science Contribution Award, is the chief designer of Datang's first satellite and launch vehicle." This is a character profile set up at the front of the Space Museum.

This person Li Ke naturally didn't know, but what made Li Ke stunned was that he was stunned by the words "Liu Ying was born in a famous scientific family in the Tang Dynasty, and his family has produced more than 100 scientists up to him." According to Academician Liu Ying, he was the stupidest among his brothers. ”

"And his ancestors are Liu Shan and An Ying, who once trained eleven academicians of the Academy of Sciences for the Tang Dynasty."

Liu Shan and An Ying...... Seeing these two people, Li Ke was stunned, and the memories in his mind came out again. They were personally sent away from Chang'an by Li Ke, but Li Ke never saw them again in his life.

"Mr. Liu Shan and Ms. An Ying, who began their lives at the age of 40, adopted a total of 27 abandoned orphans, 7 boys and 20 girls, in addition to their own two children. Among these 29 children, a total of 11 academicians of the Tang Academy of Sciences have come out. ”

"And it wasn't until these academicians were old that the people of Datang knew that they all had a common father and mother."

"According to the words of these academicians at that time, their father and mother taught them to be humble and low-key since childhood, and if it wasn't for someone slandering their mother at that time, they wouldn't have said it."