When I was a child, my teacher told Hu Kehao that there are no ghosts in the world and don't believe that there are ghosts in the world. Hu Kehao is an obedient child, according to the teacher's requirements, earnestly study Chinese, mathematics, physics, chemistry and other courses, his favorite is physics. As Hu Kehao learns about advanced relativity and quantum mechanics, he finds the world increasingly puzzling. According to the view of quantum mechanics, there is no law of cause and effect in this world, everything is "God rolling the dice". According to the wave envelope collapse theory of quantum mechanics, when you are dancing, there is a possibility that a peerless beauty may suddenly appear in front of you to dance with you, but the probability of this kind of thing appearing is extremely small, almost zero. In this way, the theory of quantum mechanics is more unreliable than feudal superstition, according to which there can never be a living "person" in front of you, at most there will be a "ghost" that you can't see and may not really exist.

Now, you're sitting in front of your computer looking at a web page, and you're in a three-dimensional real space. However, there may be a cat running around in the very position where you are sitting, but you can't see the cat. This cat, let's call it "Schrödinger's cat", is in another dimension that we don't know about. No matter how much we search, we can't find the "Schrödinger cat". Because the "Schrödinger cat" is now in the supernatural space, that is, in the fourth dimension. This space is fundamentally different from the three-dimensional space we are in, and it generally requires extremely high energy (such as high-energy physics) to open a "wormhole" to enter, which is the current frontier problem in particle physics research.

We live in a three-dimensional world, why can't we see the fourth-dimensional supernatural space? Quantum mechanics and cosmology tell us that the fourth dimension is curled up to the size of Planck's size – 10 to the 33rd power (i.e., one billionth of a millimeter), so we can't see it. If the space of this scale is not affected by special forces, it will not open, and ordinary people will not be able to enter.

During his days of living and working between the countryside and the city, Hu encountered many strange things, which now seem to be explained by advanced physics (electromagnetism, relativity, and quantum mechanics).

Things have to start from the year Hu Kehao graduated from U University......

Chapter 1: Graduation

This is a hot pot restaurant with a not-so-luxurious decoration, and seven or eight out of ten seats inside are already full. Gu Fei, the squad leader, knew that there was not much left in the class fee, so he could only choose such a medium-grade hot pot restaurant. This is the last graduation dinner, and the students in the class will fly their own things after this meal.

All the graduating students had dinner here, and a total of 10 tables were seated. The gas tank under the table erupted with flames, and the hot soup in the mandarin duck hot pot was tumbling. A pair of chopsticks are sandwiched in the soup with hairy belly, goose intestines and the like. The hairy belly and goose intestines rise and fall in the soup several times, and then they are sandwiched into a bowl, dipped in garlic paste and sesame oil, and sent into the stomachs of diners. Cups, beer, poured into their stomachs with a burst of shouting, and the carbon dioxide in the beer was released and came out of their throats.

This is a theoretical physics student at U University. During these four years, they learned a lot about the natural world, about physics, about the mysteries of the universe. However, they now find that the degree seems to be of little use. Who wants to hire a theoretical physics major to study relativity and quantum mechanics? According to the basic principle of the theory of relativity, when matter moves faster than the speed of light, time goes backwards. If it were true that time could be turned back, students who did not find a job would not choose theoretical physics. Why did Hu Kehao choose this major at that time? One reason is that I don't understand what this major will do in the future; The second reason is that when I was a child, I studied a text about Einstein as a small bench, and Einstein became his idol; Later, in high school physics class, he learned Hooke's law, and he found that he also had the word Hook in his name. So he strengthened his love for physics, and later applied for the theoretical physics major at U University.

Some of Hu Kehao's classmates have been admitted to the Chinese Academy of Sciences as graduate students, and they will continue to explore the secrets of nature; Some of them want to go to companies such as optical fiber communication, equipment and instruments, but fortunately, they are also related to physics majors. Hu Kehao's family conditions are not good, he cannot afford to study for graduate school, and after graduating from graduate school, he still faces the problem of finding a job. Through his own efforts, he applied for a job as a counselor at U City Polytechnic University. The overall strength of U City Polytechnic University is lower than that of U University, but it is also a very prestigious university. He was glad he had found a job, otherwise his family's financial situation would have collapsed. The work was finally implemented, and he felt very sure. He picked up a glass of beer in front of him and poured it down. Right now, he wanted to muster up the courage to be bold. He turned his head to look at the table next to him, where Dong Mengjie was still sitting. Some of the girls at the same table have revealed their true colors, drinking more than the boys, holding up the wine glass and drinking it all, and some even blowing up the bottle. Dong Mengjie still sat there quietly, drinking just a sip of wine.

Hu Kehao met Dong Mengjie when he was in self-study. At that time, Hu Kehao sat in the back, and Dong Mengjie sat in the front two rows. The weather was very cold, Dong Mengjie held a hot water bottle to warm her hands, the hot water bottle rolled around in her hand, she sometimes put her face on the hot water bottle to warm up, and sometimes put her hands on the hot water bottle to rub. They were doing physics homework and needed to draw pictures. Through small routines such as borrowing erasers, Hu Kehao met Dong Mengjie. They also discussed some solutions to physics problems. And then, there is no then...... Hu Kehao often saw a boy with her when he was eating, and he held an umbrella for her when it rained. There is no doubt that the boy is already Dong Mengjie's boyfriend. He didn't know Dong Mengjie's boyfriend's name and major, and he didn't need to know. So, Hu Kehao just met Dong Mengjie. Hu Kehao saw Dong Mengjie sitting at the next table, and he had to go and have a drink with her. He picked up the wine glass, came to Dong Mengjie's side, mustered up the courage to toast her, and said some clichés such as blessings, Dong Mengjie drank it, he drank it too, and they drank it together. He didn't know if she had found a job, and he didn't ask her about her plans after graduation, maybe it was the last time they would see each other. At the end of the drink, the leaders of the college made a speech and summarized, they poured the last glass of wine, and then some went to KTV to do the last madness, and most of them went directly back to the dormitory.

It's graduation breakup season, the last tail of four years of college. After four years of study, they were given two pieces of paper, a graduation certificate and a degree certificate. They will go from school to society and start a new journey in life. Some of the students spent four years in a daze, and when they woke up, they had already graduated.

Slowly, almost all the brothers in the dormitory left, leaving only Hu Kehao and his best classmate Lao Zheng. Tomorrow is the last day to leave school for the school notice. Hu Kehao and Lao Zheng received an ultimatum that they must leave tomorrow or face expulsion.

"Brother, tomorrow we will go our separate ways, and we can have dinner together tonight." Lao Zheng sat on the top bunk of the iron frame bed, buckled his stinky feet, and shook the iron frame bed loudly.

"What do you want to eat?" Hu Kehao asked.

"Let's go eat the skewers at the back school gate." Lao Zheng replied.

They collect things in the dormitory. Lao Zheng was very annoyed when he saw those broken books, broken books, and broken reference materials, and he didn't want any of them. He picked and picked from the pile of broken books, kept a few books on feng shui mystery, astrological divination, Zhou Yi gossip, and Buddhist scriptures, and threw the rest into the garbage heap.

"Brother, you should still keep a few professional books. We are all atheists who have studied Marxism-Leninism and Mao's thoughts, so what are we doing with these superstitious monster books? Hu Kehao taught Lao Zheng earnestly.

"I'm going home to follow my parents in business, and these Feng Shui books are very useful to me. At that time, I will become a fortune teller, and I can tell you fortunes and ensure your wealth and prosperity. Lao Zheng said to Hu Kehao.

They each put away their luggage, zipped up their bags, comfortably urinated in the toilet, and flushed the toilet with water. With a "pop", Lao Zheng closed the bedroom door and said to Hu Kehao: "Let's go, eat skewers!" ”

They didn't have much money during their studies, and the food stalls outside the school gate were the places they frequented. The owner of the restaurant knew that these students had a lot of food, and he was very scared when he saw them, and it was said that some of the cafeterias had been destroyed by the students. Lao Zheng is a fat man, and the boss shook his head when he saw him.

"Boss, don't be afraid of me, you have to sign a lot if you eat, eat more and pay more, and you don't lose money." Lao Zheng said to the boss.

"The boss used to run a buffet, but you were afraid of eating it, so he changed to sell skewers, and you still didn't let people go." Hu Kehao teased.

"We took care of the boss's business for the last time today, and it will not be easy to meet someone with such a large amount of food as me in the future." Lao Zheng said.

After eating the skewers, they went back to their dorm room and slept for the last night. Hu Kehao was so full of thoughts that he couldn't sleep. Lao Zheng snored while lying on the bed. In the past days, Hu Kehao was most annoyed by Lao Zheng's snoring. He thought of many ways to deal with it, wearing earplugs, plugging his ears with his fingers, and waking him up in the middle of the night. Now, he felt that Lao Zheng's snoring was so lovely and precious, because he would never hear his snoring again.