Soul Returns to Hong Kong: From Tailor Shop to Richest Woman

Nine o'clock in the morning, third floor of the Graduate School of Beijing University of Science and Technology.

Zhao Qiming led Lin Ying to the door of the large conference room and said, "Lin Ying, there are quite a few people inside. Don't be nervous, just answer the questions you know."

Lin Ying nodded: "Okay."

Lin Ying pushed open the heavy double wooden door and went inside.

As a result, there were more than thirty people sitting in the conference room; most of them had gray hair and were wearing short-sleeved shirts; there were also three people in military uniforms sitting on the left.

Are all universities in Beijing this rigorous, with over thirty interviewers interviewing just one student?

Lin Ying walked to the center of the field and stood there.

"You are Lin Ying?" asked an elderly man sitting in the middle.

"I am."

"Your written test paper has been seen by everyone here," he said, pointing to a stack of photocopies on the table. "Your math skills are excellent, and your signal theory is also very solid. Today we won't test you on those rote facts."

"In your business plan, you mentioned wanting to work on communications and electronic hardware. I'd like to hear your vision for the future of communication technology."

A young teacher nearby added, "Speak freely, speak boldly."

Hearing such a vague question, Lin Ying blinked.

Lin Ying got straight to the point: "Current communication networks largely rely on central base stations and long-distance, high-power transmission, resulting in massive equipment and extremely low frequency resource utilization."

"My idea is to completely abandon the regional system and switch to a cellular mobile communication network."

"A wide coverage area is divided into many tiny hexagonal regions, like a honeycomb. Each cell has a low-power base station. Adjacent cells use different frequencies, while cells that are a certain distance apart reuse the same frequency."

"This frequency reuse technology can increase communication capacity by hundreds or thousands of times. Moreover, with the reduction of base station power, terminal devices do not need to carry heavy batteries and high-power antennas, making them miniaturized and portable."

Lin Ying picked up a pencil from the table and gestured to indicate its size: "The ultimate terminal can even be shrunk down to fit in a pocket and move with the person anytime, anywhere."

Several professors from the Department of Electrical Engineering sat up straight; their current walkie-talkies were extremely heavy and inconvenient to carry.

Lin Ying didn't stop there, and then threw out a startling argument: "To realize this network, analog signals alone are not enough. Analog signals have poor security, are easily interfered with, and have a limit to their spectrum utilization. We must completely switch to digital signal processing."

"Analog voice is converted into a digital stream of 0s and 1s, packaged using an encryption algorithm, and then used with Time Division Multiple Access (TDMA) or Code Division Multiple Access (CDMA) technology to allow multiple users to talk simultaneously within the same frequency band."

Someone in the meeting room started writing, and then everyone lowered their heads to take notes.

The concept of cellular networks had just been introduced when the topic of digital encryption followed closely, and then came the idea of ​​small, portable terminals.

If this can be implemented in the military command system, it means that combat units at all levels can break away from fixed communication vehicles and achieve highly secure communication at the company, platoon, and even individual soldier levels, enabling real-time contact around the clock!

This is something that can change the course of the battle!

Lin Ying continued explaining the underlying architecture: "The baseband chip is responsible for signal processing and encoding/decoding, while the radio frequency circuit is responsible for transmission and reception. The hardware requires high-precision filters and phase-locked loops; relying solely on purchasing foreign components for assembly is not a sustainable approach. Core algorithms and chip design must be developed in-house."

Lin Ying spoke for a full thirty minutes.

The content covers network structure, then transitions to digital encoding and decoding, and finally focuses on the hardware separation of baseband and radio frequency, and the closed-loop logic chain.

After Lin Ying finished speaking, the only sound in the conference room was the soft scratching of a pen on paper.

Everyone present was experiencing a profound and overwhelming shock.

A minute later, the old man asked, "Lin Ying, what's the basis for your explanation of these concepts about cellular networking and code division multiple access? Are the labs at Cambridge University, or the British, already working on implementing these applications?"

Everyone was afraid she would say that Britain had entered the practical stage.

in accordance with?

She can't very well say that she saw mobile phones, base stations, and mobile networks in her past life, and also witnessed the telecommunications industry over the next few decades.

Lin Ying shook her head: "There is no basis for this. The UK is still conducting analog signal research, and no one has proposed a systematic digital network architecture."

"So your theory..."

"It's my own idea; it's based on probability theory, matrix algebra, and deductions from current development trends."

"I looked at the data from electronics industry exhibitions over the past ten years. Transistor density is constantly increasing, and computing power will inevitably increase exponentially; as long as the computing power can keep up, complex digital encryption and decompression can be completed in a very short time; this is the underlying logic behind my proposed architecture."

Deduced through mathematical deduction? While others were still at the basic theoretical stage, she directly derived a future technical architecture solution through computational power!

Are those people at Cambridge blind? How dare they let someone with such a brain come back to China?!

After a brief silence.

A middle-aged man who appeared to be a leader stood up and said, "Lin Ying, you spoke very well! You can go back and wait for further notice."

Lin Ying paused for a moment. Shouldn't they have asked some details or tested her on the specific derivation? Is that all? She frowned slightly as she muttered to herself.

Are these veteran experts' reactions a bit too lukewarm? Do they think I'm just spouting nonsense?

Unbeknownst to Lin Ying, the conference room door had just clicked shut as soon as she left.

The previously quiet and serious group of over thirty people instantly sprang into action: "Quick! Pull out the frequency reuse and time division multiple access model she just mentioned and calculate it!"

"Call Dean Zhao of the University of Posts and Telecommunications immediately and tell him to cancel his meeting and come here right now! No, call everyone from the research labs with communication modules!"

"Seal today's records! No one is allowed to take their notes out of this room before the meeting ends!"

The leading officer walked to the phone in the next office and dialed a number.

"Connect me to the Third Department of the General Staff; a strategic-level communications talent has been identified; immediately initiate a top-level background check on the target; name Lin Ying, Hong Kong resident, just graduated from Cambridge."

"Yes, investigate all the reasons for her return to China, and investigate her social connections in Hong Kong and the UK;"

One day later.

In an office in Beijing, several file folders marked "Top Secret" appeared on the table.

A middle-aged man in a white shirt flipped through the files quickly, while two staff members in plain clothes stood beside him.

"Lin Ying was born on December 27, 1971. Her father, He Dazhu, was an inland farmer who illegally immigrated to Hong Kong from Guangdong Province in 1968 and had no political background. Her mother, Lin Lanying, was an indigenous person from the New Territories of Hong Kong who made a living by sewing."

"Her social relationships were also simple. Her family had a clan background in the New Territories and had produced several commercially successful films. However, there was no infiltration by any external capital or hostile forces. During her time at Cambridge, she kept to herself and her activities were limited to the library and classrooms. She had good relationships with several British and American students, but she did not come into contact with any sensitive political groups."

The staff member opened the second document: "In addition, we verified something that happened before she left the UK."

"On the 26th of last month, she encountered a knife attack targeting civilians at London Airport; there happened to be a Chinese military unit that was transiting through the Middle East on its way to peacekeeping.

"Our people protected her and her British friend; according to the platoon leader in charge, the girl was very calm at the scene. After the riot subsided, she took the initiative to thank them in Mandarin and expressed a very strong sense of identity."

"A clean background, capable yet mindful of his roots," the middle-aged man praised. "Isn't this the kind of treasure we'd struggle to find even with a lantern?"

The middle-aged man stood up: "Notify the University of Science and Technology to use the fastest special approval channel for the admission process; provide them with a supervisor, funding, and facilities. Tell them this is a valuable asset, and they shouldn't be treated unfairly!"

"clear!"

That evening, at the guesthouse.

Lin Lanying was tidying up the Beijing specialties she had bought during the day in her room, He Dazhu was reading the newspaper, and Lin Ying was relaxing by watching TV.

There was a knock on the door.

He Dazhu put down his newspaper and went to open the door; Zhao Qiming stood outside, holding a large cardboard box.

"Is Lin Ying here?" Zhao Qiming asked, his face beaming.

Lin Ying walked over: "Yes! Senior Brother Zhao, what's the matter?"

Zhao Qiming placed the cardboard box on the table: "This is something jointly approved by the school's graduate school, as well as several deans from the Department of Electronic Engineering and the Department of Automation; your admission notice has already been stamped through a special approval channel; here are your student ID, meal card, and a special pass."

Lin Lanying stopped what she was doing, puzzled: "Didn't we say we'd go back and wait for further notice? How come the student IDs and meal cards are already ready in just one day?"