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Chapter 1206: Nanyang, the South Sea that Promotes Human Civilization (Second update, please subscribe)
Thousands of people enter Nanyang from Chang'an International Airport every day, most of them with various dreams.

dream!

This is exactly the most intuitive impression that Nanyang gives to the outside world - here everyone has the opportunity to make their dreams come true. In fact, this has become a label for Nanyang.

"This is Nanyang. It's really different from London."

Excitedly walking down from the plane... no, it should be walking out, the boarding stairs turned into a boarding bridge. Even though it had surprised representatives from various countries during last year's Olympics and was even reported by television stations in various countries, it was still extremely new to the passengers who stepped onto the boarding bridge for the first time.

Among them was Hawking, who had applied for an exchange student program at Nanyang University a few months ago. As he was studying at Oxford University, his application was easily approved, which led to his current trip to Chang'an.

When passing through customs, Hawking did not encounter any ferocious customs officers - even in the British public opinion circles, the evaluation of Nanyang customs was two-sided. Some people said that they were very kind, and some people said that they were very ferocious. Although the former was more common, in universities, people tend to tend to be the latter.

"An exchange student from Chang'an University?"

While the customs officer was looking at the invitation letter, he was also sizing up the young man in front of him. Nanyang would naturally welcome such a talent with open arms.

After simply asking a few questions, he let me go.

Everything went so smoothly. There was no accusation in some newspapers that Nanyang Customs would make things difficult for some people when they entered the country.

He passed customs smoothly and walked out of the airport smoothly. However, he did not take a taxi to the city, but took the subway directly to Nanyang University. Nanyang’s public transportation is very developed, and the infrastructure was complete before the Olympics. For Chang'an Metro, the facilities were fully upgraded in the past few years. Not only have escalators been added in many stations, but they have also been extended to the airport, and there is a fast track to Nanyang University in Genting Highlands.

In short, convenient public transportation makes travel more convenient for the public.

Sitting in the subway car, Hawking looked around the car curiously. Unlike the old subway cars in London, the car here not only looked new, but the white interior even had a sci-fi futuristic feel.

In this way, the subway moved forward all the way, and after more than ten minutes, it drove out of the underground. When the subway came to the ground, Hawking saw Chang'an, but it was not the urban area, but a row of endless houses. When he saw those houses, Hawking deliberately leaned over to look at them.

During last year's Olympics, people had already had a good understanding of the Nanyang community through television and other media, but Hawking, who had just arrived in Nanyang, was still very curious.
After all, as far as he knew, these houses were built after the war, which was the most difficult period in Britain. For Britain where millions of houses were destroyed, the biggest problem of the Labour Party at that time was the need to provide those houses. However, until they stepped down, they failed to provide enough houses. But here, they provided millions of houses to tens of millions of people.

“This is the power of industry!”

Looking at those neat and beautiful houses, Hawking thought of the introduction he had seen on TV: they used the popular production methods of the automobile manufacturing industry to set up manufacturing workshops on the edge of the rainforest, using the reclaimed rainforest wood to build houses, and then transported them to the community. A new house was built every 16 minutes in all communities. A large number of "unskilled" workers were used, and from one house to another, each person only needed to operate one of the 26 highly specialized steps to complete the entire assembly process. They used completely standardized materials produced directly from the factory.

In this way, relying on this standardized material, they provided tens of millions of houses in a short period of time. Since then, the Nanyang-style life has become familiar to the world.

“It’s just like America here…”

Hawking could not help but let out a cry. Southeast Asia and the United States had many similarities - both were immigrant countries, both focused on machines and innovation. However, it was different from the United States because most of the immigrants here were Tang people. Of course, there were also many European immigrants, just like in this carriage, there were several Europeans of different ages.

The subway continued to run on the ground, and then entered the mountainous area. There were dense rainforests everywhere nearby, and some wild animals could be vaguely seen. After about twenty minutes, the subway finally arrived at the station - Nanyang University.

This is the top institution of higher learning in Asia, home to many world-renowned scholars. In the past few years, Nanyang University has been leading the development of world science.

After walking out of the station, I looked at the gate of Nanyang University across the road. This gate does not look very conspicuous. According to some standards, it seems a little unworthy of the status of a university. In fact, Nanyang University has many gates, more than 20 gates, each of which has exquisite carvings, both Tang style and Western style. The towering teaching buildings and greenery on the campus complement each other, all of which show the harmonious beauty of the Eastern and Western classics and modernity.

But at this moment, looking at this door, Hawking's mind emerged from the sentence he saw in a magazine:
"Some countries are developing in the opposite direction of human civilization, some countries are developing in the general direction of human civilization, and Nanyang is the country that is pushing the development of human civilization."

Nanyang is the country that drives the development of human civilization!
It is Nanyang’s higher education that has driven the development of Nanyang, and Nanyang University is one of them.

Just as Hawking was expressing his emotion, a voice came from the side.

"How is it? Nanyang University..."

A young man standing next to him said, "It's the only university in the world named after a country!"

The young man wearing glasses spoke with admiration in his tone. Like Hawking, he was also holding a suitcase in his hands. He smiled at Hawking.

"My name is Cui Qi. I am a graduate student at National Chung Hsing University. I major in physics. What about you?"

"Stephen William Hawking, I am an exchange student from Cambridge to Nanyang, and like you, I am also studying physics."

Just like that, two young people from the East and the West introduced themselves in front of the subway station. When they were shaking hands, a passerby who was taking pictures for his friends happened to capture this scene.

Although the two people in the photo were just passers-by who strayed into the camera, what was recorded was a moment in history!

History, sometimes, always happens inadvertently and is witnessed. When Tsui and Hawking walked into Nanyang University,
In the physics laboratory of Nanyang University, a brand new atomic clock is also undergoing intensive experiments. This is the world's first rubidium atomic clock.

Six years ago, the Royal Physical Laboratory of the United Kingdom successfully developed the first cesium beam atomic clock using cesium-133 atoms, the only stable isotope of cesium, thus ushering in a new era of practical atomic clocks.

The Nanyang University Physics Laboratory immediately began to cooperate with them. From replicating and studying cesium beam atomic clocks to developing rubidium atomic clocks, research work in the Physics Laboratory has never stopped.

"If you want to install an atomic clock on a satellite and use time for navigation, you must use two atomic clocks. The long-term stability of the cesium atomic clock is better, and the error can be corrected for several days or even more than ten days. The accuracy of the rubidium atomic clock is better than that of the cesium atomic clock in a short period of time, but the error must be corrected for a longer period of time. Therefore, only by cooperating with each other can the accuracy requirements be met..."

In the physics laboratory, as soon as Li Zhengdao finished speaking, someone spoke up.

"There are also hydrogen atomic clocks available, which have the advantages of both,"

Looking at the students who made suggestions, Tsung-Dao Lee said:
"You are right. Hydrogen atomic clocks have the advantages of both, but their design is relatively complex and difficult to apply. We can use this as a research direction, but for now, cesium atomic clocks and rubidium atomic clocks are the best choices."

Three years ago, on the plane to Stockholm, he had an in-depth exchange with Your Excellency. On the plane, Your Excellency proposed the concept of satellite navigation and encouraged him to conduct research in this area. From that day on, he has been focusing on the research of atomic clocks and satellite navigation.

From initially collaborating with the UK on research on cesium atomic clocks to independently developing rubidium atomic clocks, over the past three years, he, his assistants and students have worked together to turn your ideas into reality bit by bit.

Although he encountered many problems in his transition from a theoretical physicist to applied physics research, he eventually overcame the difficulties and shrunk the British-designed atomic clock, which was very large and equivalent to the size of a room, down to a few hundred kilograms, equivalent to the size of a 180-liter refrigerator.

Compared to the bulky cesium atomic clock, the rubidium atomic clock is the simplest and most compact of all atomic clocks. This clock uses rubidium gas in a glass chamber. When the surrounding microwave frequency is just right, it will change its light absorption rate according to the optical rubidium frequency.
It is precisely because of its outstanding performance that Li Zhengdao chose it as a breakthrough.

"Combining the two may be a little heavier, but at least it can solve the problem of whether it exists or not. Of course, the most important thing is that we have to verify the accuracy of this navigation first."

There is definitely no problem in concept. The only problem is the navigation accuracy. If the accuracy can meet their expectations, then the history of human navigation will undergo earth-shaking changes from this moment on.

"Teacher, at present, the biggest problem with using satellite navigation is that it requires a lot of satellites. It needs to consist of 24 satellites orbiting the earth, about 1.7 kilometers away from the ground, which means that their launch cost is very high. Teacher, do you think the military will really support the launch of so many satellites to solve the navigation problem?"

It seems that there is no other demand for that kind of high-precision navigation except the military.

Facing the students' questions, Tsung-Dao Lee thought for a moment and then said:
"For the military, knowing where they are at any time and anywhere is more attractive than any weapon. They will definitely be willing to invest. Moreover, navigation can be applied in many industries such as aircraft and ships. One day in the future, each of us will carry a portable satellite positioning receiver when we go out. At that time, even if we arrive in an unfamiliar place, we can easily find the place we want to go on the map according to the location displayed by the satellite positioning."

When saying this, Li Zhengdao still had some doubts in his mind - what should he do if he can't recognize the map?
But this is exactly the application scenario of satellite positioning that you described to him, and he has never doubted your words.

"As for the cost of the launch, the Americans used one rocket to launch three satellites last year. Wanhujiao must be researching similar technology. If successful, only eight rockets will be needed to send 8 satellites into space!"

After that, Li Zhengdao thought for a while and added:

"In short, let's do the current work well first, and we won't consider the rest."

(End of this chapter)