With its capital in Bonn and its financial center in Frankfurt, West Berlin is just an enclave, surrounded by hundreds of thousands of Soviet Red Army and East German People's Army.

The company does not have any political and official background, the manager of the overseas department Daniel only pays attention to commercial value, West Berlin is such a big place, a total of hundreds of thousands of people, naturally will not waste time and energy here, the charter, Zhang Lin and Zhang Tingxiu just settled down, he took his new wife Yin Wanyi overnight to fly back to the Frankfurt branch.

The so-called representative office of NB Electric West Berlin is the old apartment rented by Daniel the day before yesterday.

The nearly 100-year-old Gothic building is lined up at Unter den den Linden Street, and to the west along the street is the famous Brandenburg Gate.

On the outside, it looks very elegant, very European, but on the inside, it looks a little unsatisfactory.

The apartment is on the third floor, and you have to take the creaking old elevator up, the walkway is eerie, the walls are mottled, and you can only feel the modern atmosphere when you open the door. Four bedrooms, one living room, one kitchen and two bathrooms, the layout is not so reasonable, it was obviously renovated later.

Due to the proximity to Liberty University, the downstairs and upstairs are almost exclusively filled with international students from Western countries.

Not only does the charter not need Zhang Lin to help him do laundry and cook as a nanny, but also help her hire a "nanny", Linne Heidemann, a German girl who graduated from the Free University, will not only be her German teacher in the future, but also be responsible for her diet and daily life, and the second-hand Mercedes-Benz is also prepared for them, for which the charter will pay nearly 100,000 SMS every year.

As for whether Zhang Lin can get used to it, the charter is not worried at all, people can change the environment, and the environment can change people even more, in this isolated island where she has no relatives, she has to get used to it if she is not used to it, it is just a matter of time.

Like Daniel, the charter will not stay in West Berlin for long.

On the morning of the third day, I said goodbye to my reluctant second sister, and accompanied by Zhang Tingxiu, a "guardian" in the legal sense, I came to the Charles checkpoint on Friedrichstrasse.

A U.S. sergeant walked out of the guardhouse and demanded that the two show their IDs, followed by the famous sign: "You are leaving the U.S. Defense Zone now!"

"Hong Kongers?"

"Yes," Zhang Tingxiu asked with a sweet smile, "Is there a problem, sergeant?" ”

After carefully checking the passports of the two people, the U.S. military motioned to the West German police behind them to let them go, and kindly reminded: "Miss, I suggest that you prepare fifty smarks, otherwise you will have to come back in five minutes, go over, good luck." ”

"Thank you."

Dragged the trolley box forward for more than ten meters, you can see the black muzzle in the distance, fully armed, loaded East German soldiers, looking like the German army in World War II, one by one, expressionless, ready for battle, the charter is really worried that they will accidentally go off.

The big wolf dog kept barking, Zhang Tingxiu's face turned blue with fright, she grabbed her arm tightly, and walked forward casually.

According to the regulations of the East German government, everyone who entered East Berlin from a capitalist country and region was required to exchange 25 West Marks for 25 East Marks at a one-to-one exchange rate.

To the surprise of the US sergeant, the two Hong Kong people who had just passed not only did not be interrogated by the East German soldiers and police, but also did not go to the opposite sentry box to exchange for East Marks, and after showing their documents, they were led to a car.

"Mr. Zhang, you are younger than I imagined, if it weren't for the phone call before, I can't believe it's true. Don't be surprised, I don't mean anything else, in fact I haven't said so much for a long time, but allow me to express my heartfelt congratulations to you, the discovery of the 'giant magnetoresistance effect' is undoubtedly one of the most important breakthroughs in the field of quantum mechanics in recent years. ”

The man who spoke was Klinsmann, in his sixties, and his face was wrinkled. Dressed in a black suit, the fold is clearly visible, obviously specially changed to welcome guests who come from afar, and the tie is crooked, and at a glance it is clear that he is an old scientist engaged in research, not an all-pervasive "Stasi" spy.

The old man chattered endlessly, but his movements were as flexible as a child, first rushing to carry his luggage, and now he was busy helping Zhang Tingxiu pull the car door, for fear of leaving an impolite impression on the guests.

"Doctor, you are a senior, you don't need to be so polite to us."

"But you're guests."

Sitting in his "Red Star" brand car, he took out two letters from his bag and said sincerely: "Doctor, this is a handwritten letter from Mr. Guo and Ms. Shen, and I have entrusted you to invite you to the NB laboratory to jointly carry out research on the 'giant magnetoresistance effect'. ”

The little old man took the letter, carefully stuffed it into his arms, and said with regret: "I am already old, and such opportunities are still reserved for those young people." Please convey my gratitude to them. ”

Turning around, the car turned into a dilapidated neighborhood.

The streets are not wide, and the concrete roads are in disrepair and rugged. There are no public trams on the streets, and there are very few cars. The leafy street lawn is lined with benches for resting, and many people sit and chat, looking very comfortable. A group of old men were shouting something into the car, like greetings, and like inadvertently making fun of foreigners.

The car finally stopped outside a villa, and the door was already full of people, who looked very excited, and they all gathered around the door to help with their luggage.

"Gentlemen, let me formally introduce that this young engineer is Mr. Charter from Hong Kong NB Laboratory, and this beautiful Miss Oriental is Mr. Zhang's guardian and the representative of Hong Kong NB Electric Company."

"Mr. Zhang, welcome to Berlin."

"Auerman, Mr. Zhang, the Center for Physical Chemistry, it is an honor to meet you."

The talent exchange program is mutual, and while the East German Academy of Sciences handles the procedures for the personnel of the NB laboratory to come to Germany, NB Electric also has to submit an application to the British government in Hong Kong with the list of East German personnel. The names, genders, and ages of the sixteen people, and even the articles of association in which institute they were engaged in which research, can be clearly remembered. In particular, Dr. Oberman from the Center for Physical Chemistry was very impressed.

They are all East German scholars who are about to go to Hong Kong, and they dare not slack off, so they hurriedly shook hands and greeted them one by one, and welcomed them to the NB laboratory on behalf of Hong Kong NB Electric.

The Germans are a veritable people who "eat meat in large chunks and drink in large gulps".

Before noon, a feast was set up, with sour cabbage topped with various sausages and hams, and a whole cooked pork hind leg. The charter and Zhang Tingxiu really couldn't eat, so they could only politely decline with a cup. And the food was not wasted, all kinds of sausages and red sausages were swept away in a blink of an eye, and the pig's hind leg was killed by Oberman alone without changing his face.

The "Stasi" is undoubtedly the most powerful and successful secret police agency in the Warsaw Pact, with world-class funding, personnel and equipment.

It is rumored that with a population of 16 million in East Germany, the "Stasi" staff reached more than 90,000, which means that one out of every 180 people worked in this institution. In addition, there are more than 1,000 full-time telephone tappers and 2,000 secret inspectors of private mail, whose duty is to open and inspect all correspondence from abroad or from within the country, and to make copies of letters deemed problematic and put them on file.

"Stasi" also has a large number of "eyeliners" that are not compiled and are scattered in various places, various institutions, and various organizations. The two are intertwined to form a huge network of spies that spread across the country.

Therefore, compared with the West Germans, who speak without taboos and spontaneously, the East Germans, who speak the same language, are worried and shrink their heads, like quails drenched in rain. While talking to you, I am staring at the political high-pressure lines in mid-air.

Dr. Klinsmann didn't want to get into trouble, so he started to discuss academics after he had had enough to drink, and while taking this opportunity to test the charter, he also wanted to let the above know the importance of talent exchange in this way.

"As we all know, computer hard drives store information through magnetic media. A sealed computer hard disk contains a plurality of disk plates, each side of which is divided into multiple tracks with a rotating shaft as the axis and a certain magnetic density as the interval, and each track is divided into a number of sectors......"

The charter had been prepared for a long time, and he spoke eloquently in fluent English: "The earliest magnetic heads were made of manganese ferromagnets, which read and wrote data by electromagnetic induction. However, with the development of information technology and the increasing requirements for storage capacity, it is difficult for this type of head to meet the actual demand. Because the change of magnetostrictive resistance is only between 1%~2% with this kind of head, reading the data requires a certain strength of magnetic field, and the track density cannot be too large.

As a result, the maximum capacity of a hard drive using a conventional head is only 20 megabits per square inch. As the size of the hard disk continues to decrease, but the capacity continues to increase, it is inevitable that each independent area of the disk that is divided into independent areas will become smaller and smaller, and the magnetic signal recorded in these areas will become weaker and weaker. ”

A middle-aged doctor pondered for a moment, then raised his hand and asked, "Mr. Zhang, do you mean that we can use the 'giant magnetoresistive effect' to develop a more sensitive magnetic head, which can clearly read out the weak magnetic signal and convert it into a clear current change?" ”

"Yes."

The charter focused on the bottom line, and confidently confirmed: "A breakthrough in the research of new magnetic heads will lead to a revolution in the large capacity and miniaturization of hard disks." The NB laboratory used a multilayer material sample composed of iron and chromium to reduce the resistance by 50%. In a sense, the 'giant magnetoresistive effect' has theoretically created a miracle of increasing the storage density of computer hard disks by 50 times! ”

As soon as the experts opened their mouths, they realized that the NB laboratory was not only the first to discover the "giant magnetoresistive effect", but also made a major breakthrough in the application research of the "giant magnetoresistive effect".

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PS: I have a splitting headache, I am not satisfied with this chapter, the big guy is making do with it, tomorrow three watches, talk about apologies.