The lab's black hole monster has been living quietly underground, untouched by humans for decades. Unfortunately, on that day, Lin Xueyi here due to an upset stomach, coupled with the early menstrual period, under the combined action of feces and menstrual blood, the secret spell that sealed the black hole failed. Generally speaking, ghosts, charms, these things are very afraid of dirty things, whether it is feces, urine, snot, saliva, blood, they are afraid. They encounter these things and often fail. For example, the article "Song Dingbo Catching Ghosts" tells us that ghosts are afraid of saliva. Actually, ghosts are afraid of all things dirty. After the spirit rune expired, the lid of Pandora's box opened, and the sealed black hole sucked Lin Xueyi in.

In an instant, Lin Xueyi was sucked in by a strong gravitational force. This feeling is just like when Tang Seng, Sun Wukong and others were attracted by the cloth bag of the Yellow Eyebrow Monster in Xiaoleiyin Temple, this force is irresistible. This yellow-eyed monster is the boy of the Buddha who laughed at the monk from the east, and made a hammer from the hammer into a short soft mace. When the Buddha was not at home, he stole two treasures, a golden cymbal and a human seed bag, and became a spirit in the lower realm. Why is this bag so attractive? In fact, there is a small black hole in it, otherwise how could Sun Wukong's mana not be able to resist? At the beginning, when chaos first opened, there were still many black holes in the universe, and there was a black hole in this cloth bag of the Buddha from the east, which was specially used to subdue demons and eliminate demons.

Lin Xueyi felt that her body was getting smaller and smaller in the black hole, shrinking more and more, and between the lightning and flint, her hands and feet were almost gone, and then later, her body was gone, and finally almost nothing. Under the strong gravitational pull of the black hole, Lin Xueyi gradually compressed and disappeared, and finally she herself was compressed to the size of the Schwarzschild radius.

The Schwarzschild radius is the critical radius of any mass with gravity. An object whose actual radius is less than its Schwarzschild radius becomes a black hole. The Sun's Schwarzschild radius is about 3 km, and the Earth's Schwarzschild radius is only about 9 mm. Lin Xueyi was attracted to this black hole, and the compressed Schwarzschild radius is only 10 to the power of -27 meters. Although Lin Xueyi is compressed into a small point with a radius of 10 to the power of -27 meters, such a space is still 100 million times larger than the -35 power meters of Planck Space 10. In such a confined space, Lin Xueyi was almost compressed into a stream of consciousness, and basically had no physical existence. It is difficult to escape from a black hole. The speed of light at 300,000 kilometers per second can't escape a black hole, so what else can escape?

Someone in the scientific expedition team led by Professor Wu disappeared, and according to Professor Yang, Lin Xueyi fell into a black hole, and Professor Wu never believed it. Professor Wu chose to call the police, and the police came to investigate the scene and saw a broken stone slab with strange words engraved on it. The strokes of the text were soaked in blood, and the mouth of the blood basin opened.

"Pry this slate open and take a look." The police officer said to the crowd of onlookers.

A middle-aged man inserted two thick steel drills into the soil at the edge of the slate, and then struck the drills with a sledgehammer, and the drills sank inch by inch. After sinking to a certain depth, the man found two stones to put on the bottom of the steel drill and made a simple lever. A few men pressed down the steel drill hard, and the big stone slab was slowly lifted.

People look under the stone slabs, and there are no big holes, how can people fall down? The policeman picked up a hoe and shoveled away the soft dirt under the stone slab, and saw a piece of bluestone ground with a pencil-sized hole in the middle.

"I wonder how deep this little hole is?" The police inserted a thin wire into the hole, but could not penetrate the hole. When I took out the wire, there was some dirt on it, and it seemed that the dirt inside the holes had collapsed.

"We can give it a try." A middle-aged man in the crowd said.

So some of the villagers went home and got buckets, basins, and funnels. The police aimed the funnel at the hole, and the villagers poured water into it, and the water quickly flowed in. After a while, two buckets of water were filled, and the water in the funnel still did not overflow, and I really don't know how deep the hole is.

"Keep pouring! I don't believe it! Even if there's a youkai inside, drown it! The police officer said.

The villagers continued to pour water into the holes. Suddenly, a buzzing sound came from underground, and the police saw that the bluestone ground was deformed, and bags were rising on it. There are cracks on the bluestone slabs, and cracks of different sizes communicate vertically and horizontally, outlining the outline of the forehead, eyes, nose, and mouth, and it looks like the face of a monster. Immediately afterwards, the bluestone ground seemed to rise, and the surrounding mound slowly became larger.

"Officer, no, the place you're standing on is swelling." A man shouted.

The policeman was frightened by the strange bluestone, and quickly climbed up and told a few men to press down the large stone slab engraved with a secret spell. Although the slab was heavy, under the action of the unknown mysterious force underground, the slab kept shaking and slowly rose upward.

"The gods have been revealed!" The crowd of onlookers saw this incomprehensible phenomenon, and several old ladies knelt on the ground.

For the safety of people's lives and property, the police were worried that there were monsters under the stone slabs and ordered the onlookers to leave quickly. Those who were timid ran away like a gust of wind, and a few of the bold ones stayed, holding hoes, shovels and other weapons, and no one dared to approach.

In Professor Wu's opinion, how can there be monsters here? He didn't listen to the police, and instead walked to the stone slab. The hearts of the onlookers rose to their throats, for fear that something would happen to Professor Wu. Professor Wu squatted on the edge of the stone slab and saw some mushy things flowing out of the stone slab, so he dipped a small wooden stick into it to observe.

"Professor Wu, come here, it's dangerous over there." A man shouted from the side.

"Folks, don't be afraid, there is no monster under the slate, it's montmorillonite! Montmorillonite that expands after absorbing water! Professor Wu observed for a while, and with his years of experience, he finally discovered this mystery.

It turns out that the rock layer below the slate has a very high content of montmorillonite, montmorillonite is a layered mineral composed of extremely fine particles of hydrous aluminosilicate, the basic unit of the crystal is silicon-oxygen tetrahedron and aluminum-oxygen octahedron, the crystal extends on the plane to form a wafer, the wafer overlaps in the longitudinal to form a crystal layer, and the crystal layer extends on the plane at the same time, and the longitudinal overlap becomes the clay mineral montmorillonite. Clay minerals also include kaolinite, illite, chlorite, etc. The structural unit of montmorillonite is TOT type, the interlayer connection is very weak, the water sensitivity is very strong, and it has a strong ability to absorb water and expand, and its volume expansion can increase several times to more than ten times after water absorption, so after the police poured water into the hole, the ground was raised, as if there was a monster inside to break out of the ground.

"I had diarrhea once, and the doctor prescribed me a medicine called montmorillonite powder, which is what you call montmorillonite?" The fellow asked.

"Yes." Professor Wu replied.

"You're such a knowledgeable professor!" After listening to Professor Wu's explanation, the fellow admired him so much. The policeman felt lonely and embarrassed.

Through this incident, Professor Wu further proved that there are no ghosts in the world, and all phenomena can be explained by the basic principles of physics. The police did not find any trace of Lin Xueyi in the mountain col, so they listed the case as an unsolved case. Professor Wu didn't believe what Professor Yang said about the black hole devouring people, and went back with graduate student Wu Jianjun. Dong Yucheng was suspicious of Professor Yang's statement, cried several times in the mountain col, shed a lot of lovesick tears, never found Lin Xueyi, returned to the school with a very sad mood, and missed the fate with Lin Xueyi ever since.

Although Professor Yang and Master Hong Daoshi believed in this fact, they were busy surveying the feng shui and site selection of the laboratory and left here. Hu Kehao had already experienced a lot of supernatural things, and he believed Professor Yang's statement, so that the class leader Li Hengyang brought the summer social practice team back to school safely, and he wanted to stay here and find a way to rescue Lin Xueyi. Hu Kehao's decision is completely out of respect for life and love for students, with his benevolent heart, even if a beggar falls into a black hole, he will give help. It is precisely because of his persistence that he finally gained a love.

Some people are very taboo about the issue of "teacher-student love", in fact, Hu Kehao is just a counselor, not a "teacher" in the strict sense, he and Lin Xueyi are about the same age, they both graduated from undergraduate studies not long ago, one is a graduate student in a university, and the other is a counselor in a college. Moreover, they are in different schools, so there is no conflict of interest and there is no negative impact on the teaching environment. Later, Hu Kehao was also admitted to the graduate school of U University, and the status between her and Lin Xueyi was more equal, and she got rid of the slander of gossip, which is a later story.