After greeting Old Soda who was staying in the next room.
Xu Yun put his cell phone in his trouser pocket and locked the door.
Left his residence.
Twenty minutes later.
HKUST East District.
"Longitude 117.2764 Latitude 31.8392"
Xu Yun turned on the longitude and latitude positioning software, hummed a little tune, and walked slowly along the campus path.
He looked around as he walked, seemingly looking for the exact spot.
have to say.
The level of science and technology these days has indeed reached a level that is very convenient from a civilian perspective.
Even with free latitude and longitude software, the positioning can be locked to five or six decimal places.
However, no matter how accurate the software is, it has a certain range, and the coverage area when implemented on the ground is still quite large.
"117.2754117.2756 found, 117.2764!"
After locking the longitude line.
Xu Yun did not rush to determine the latitude line, but first glanced around...
At this time, he was located in the eastern part of the East Campus of HKUST, near the floating lecture hall.
On his right hand side at two o'clock is the soul heartland of HKUST:
Guo Moruo Square.
This was the core battle area where cockroaches were disinfected in the first place, and millions of cockroaches were eliminated.
Behind him, in the direction of seven o'clock, was Building 14 where Chang Licheng and the others were:
It was the mistakes of Chang Licheng and Ye Guohong that led to the first wave of cockroach riots and the subsequent live broadcast of the disinfecting.
In a sense.
That can also be regarded as the source of all evil.
Then Xu Yun raised his head and glanced at the sky.
After confirming that it would not rain in a short time, he continued to search for the target along the latitude.
"Archives 215th Floor 216"
He marched along like this, passing several more conspicuous buildings one after another, and the latitude of the software was getting closer to the target.
"31.8372"
"31.8384"
"31.8388"
"31.8392"
Fifteen minutes later.
Xu Yun stopped at a location very close to the southeast gate of the East Campus:
This is a small sports ground consisting of a basketball court. Across the avenue, more than fifty meters to the east, is the Earth and Space Science Frontier Research Center.
To the west is the East District Physics and Chemistry Building.
At this moment.
In the basketball court, there were several boys playing 3V3 at half court, and there were seven or eight substitute players sitting around them, three of whom were wearing short-sleeved shirts.
To know.
It's the end of December now, and those who dare to wear short-sleeved shirts are brave.
The game on the basketball court was fierce, but Xu Yun had no desire to watch the game.
“It’s so weird”
He just stood on the sidelines and observed the center of the field for a while, but he didn't find anything that even remotely related to the word 'reward'.
The reward can’t be a ball, right?
Or a basket?
Xu Yun then pondered for a moment and looked around.
Maybe what the piece of paper gives is not a certain point, but an area?
To the right of the basketball court is Southeast Gate Avenue. The flow of people at this time is neither too much nor too little. There is only one person every seven or eight steps.
The trees on both sides of the road had their branches reduced in advance due to overwintering.
The tree body is also wrapped with hemp rope, which is a measure to keep warm and prevent frostbite, while also reducing insect damage.
Everything is normal on the right side.
Xu Yun's brows tightened more and more, and his eyes turned to the left again.
Fifty meters away to the left of the basketball court is the Physics and Chemistry Building in the East District. The area between it and the basketball court is even more empty than Southeast Gate Avenue, and there are several faculty and staff cars parked deserted.
Other than that.
There were only a few construction workers left who seemed to be repairing sewers, and no one else was left.
etc?!
Looking at a worker who had just gone down the well, Xu Yun suddenly felt a flash of lightning in his heart:
yes.
If the reward cannot be found on the ground, could it be underground?
Based on all past performance of Halo.
It may pretend to be mysterious, it may surprise or frighten people suddenly, but it will never be wrong.
That is to say
The reward is most likely under the ground!
While Xu Yun was thinking, a shout suddenly came from his ears:
"Hey, Xu Shen?"
Xu Shen.
After spending a year in the Northern Song Dynasty, this was the first time Xu Yun heard this title.
So he subconsciously started to look in the direction of the sound:
The speaker was a girl in a white coat, not very tall, with a ponytail.
At this time, the girl was standing on the edge of the sewer, tiptoeing, waving to herself with a flying face.
Xu Yun was slightly stunned when he saw this. While waving to the other party, a name quickly came to mind:
Guo Yuting.
This is a junior student from the Department of Biology. She is currently studying in her sophomore year. Her grades are quite good and she has never missed a scholarship.
Guo Yuting once helped Xu Yunyan when he was in his second year. She was a very hard-working little girl.
Meeting an acquaintance by chance, Xu Yun temporarily put aside his thoughts.
He walked quickly to Guo Yuting, nodded to the other two boys in white coats, and asked Guo Yuting:
"Xiao Guo, what are you doing?"
Guo Yuting immediately gave him a look that said, "You have to take the blame." She spread her hands and said:
"Isn't that true? God Xu, you used your mighty power not long ago to dominate the world and wiped out all the cockroaches in the East District."
"Later, the school considered that although cockroaches store cockroach eggs through ootheca, they sometimes lay eggs into settlements. In addition, during the poisoning period, the ootheca and vagina are stimulated to open and close. It is estimated that there is
Many eggs were left underground."
"So the school organized a professional disinfection team to conduct a comprehensive screening of the drainage pipes along the way. It can be said to kill two birds with one stone."
"And we are the unlucky ones."
Speaking of this, Guo Yuting couldn't help but sigh and pointed to the ground:
"Of course I'm here to collect soil samples."
""
The corner of Xu Yun's mouth twitched slightly, and he felt that the students in front of him instantly turned into creditors.
Actually, think about it.
The actual cost of the previous disinfecting organized by Xu Yun may not be particularly high, but the various sunk costs and risk costs are not low at all.
So after making big news.
Naturally, the University of Science and Technology will take advantage of his illness to kill him, and chase him back to his lair to eradicate his illness.
To avoid troubles along the way and end up working in vain.
At the same time, since cockroach eggs need to be disinfected, Nature will not miss this good opportunity to take samples.
After all, high-density soil where wild cockroaches live is easy to say, but quite troublesome to find.
Especially this kind of cockroach nest that has been accumulated for several years or even more than ten years is disgusting, but the research value is really not low.
Just like coffee beans.
At present, there are more than 4,000 ppm-level substances in a coffee bean, and more than a thousand of them are not yet known. We just know that there is such a thing.
Same reason.
A piece of cockroach nest soil the size of a fist is conservatively estimated to contain tens of thousands of special substances. Maybe you can actually discover something?
Therefore, from an academic point of view, this approach is obviously no problem.
But this way.
It’s a tough job for junior students like Guo Yuting in the Department of Biology.
Looking at the junior students with resentful faces, Xu Yun quickly made a gesture of putting his hands together:
"I'm sorry, I'm sorry, let's do this. My research team is looking for someone to help with statistics on some ordinary documents over the weekend."
"The hourly wage is 25, eight hours each day on two weekends, and one meal is included. Are you willing to come?"
When Guo Yuting and the other three heard this, their brows suddenly lit up with joy:
"real?"
The annual enrollment of HKUST is only 2,000, and a considerable number of students are from low- and middle-income families, and their monthly living expenses are only 800-1,200.
Therefore, in HKUST or most C9 universities, it is normal to go out and work part-time on weekends.
Part-time hourly wages in Luzhou are generally 8-12 yuan, and some of the better ones can reach 15 yuan.
As for higher education, the only jobs available are tutoring or doll costumes, which are hard to come by.
You can get an hourly salary of 25 yuan by doing statistics on documents in the laboratory. Even if you only work for a weekend, you can get 400 yuan in your account.
For Guo Yuting and others who were born in ordinary families, this is undoubtedly a very generous sum of money.
Therefore, they soon put aside their joking resentment and began to talk openly about Xu Yun.
Of course.
Giving this kind of "high salary" is not because Xu Yun is generosity to others or squandering funds.
According to the requirements of HKUST.
The hourly salary for normal BSL-3 laboratory statistics starts at 25 yuan, but Qiu Sheng was always in charge of this.
After calming down the emotions of several junior students, Xu Yun asked again:
"Xiao Guo, did you collect samples this morning?"
Guo Yuting nodded, pointed to a small closed box next to her, and replied:
"We just came from the pipeline entrance on Kaizhennan Road and collected four samples in total."
"The shallowest one is 1.5 meters above the ground, and the deepest one is nearly ten meters. They are all large cockroach nests."
Xu Yun nodded slightly, pointed to the wellhead in front of him and asked:
"What about this?"
"This one"
When Guo Yuting heard this, her face suddenly became more solemn:
"We have just arrived here not long ago. It rained water and opened grooves more than ten minutes ago. Now the master in charge of pipeline maintenance is checking the situation down there."
"If there is no problem with the pipeline, we will find a suitable node to collect soil samples, but"
Xu Yun glanced at her and asked:
"But what?"
Guo Yuting gestured around, pointed to the southeast gate, and said:
"But unlike other nodes, this node is the largest and oldest sewage discharge node at HKUST."
"During the original cockroach eradication process, the largest number of cockroaches emerged in this area."
"So if nothing else goes wrong, there should be a very large cockroach nest below, or it could be the largest cockroach gathering point at HKUST."
"Old nest?"
Xu Yun blinked and looked thoughtful.
Although in reality it has only been less than a month since the cockroaches were eliminated.
But for him, the actual time span has exceeded a year, and some details have long been forgotten.
But when Guo Yuting said this, he also remembered something like this:
The main battleground for cockroach eradication was located in Guo Moruo Square, and the largest cockroach army during that period seemed to have indeed emerged from this area.
Could it be that the rewards given by the halo
Is it still related to the cockroach from before?
Xu Yunjian was silent for a while, pointed to the basketball court not far away and said:
"Xiao Guo, does the pipeline at the wellhead pass through the basketball court?"
Guo Yuting glanced in the direction of the basketball court, shook her head and said:
"I can't remember this clearly. After all, I can't understand the construction drawings. I only remember that here are the nodes, and there seem to be three."
As a result, before Guo Yuting finished speaking, a voice with a northwest accent came from beside her:
"There is a pipe under the basketball court, or a medium-sized sewage pipe."
Xu Yun and Guo Yuting both turned their heads and discovered that a maintenance engineer was climbing out along the ladder.
The words above were spoken by this person.
When the swordsman came up, Xu Yun took the initiative to hand him a cigarette. Xu Yun himself did not smoke, but he was used to bringing a pack of cigarettes just in case:
"Master, is there anything abnormal in that pipe?"
"Tsk tsk, Yuxi, thank you, buddy."
The maintenance man took off his gloves, took the cigarette, pinned it to his ear, and then said:
"Abnormal? Nothing unusual. It's just that the smell in one section of the pipe is much lighter than in other areas."
Xu Yun suddenly became interested:
"The smell is much lighter?"
The maintenance man nodded and pointed at the manhole cover with his calloused left hand:
"The pipes under the basketball court are all 1800 specifications, which is 1.8 meters, and there are several 2400 and one 3000 external main pipes in front."
"There is a section of it, almost under the basketball court you mentioned, where the smell is a little lighter than the surrounding area. I thought it might be because there is less silt and garbage."
As he spoke, the maintenance engineer also laughed:
"After all, it is a sewage pipe. With water flowing, the amount of garbage retained at each node must be different."
As the saying goes.
The speaker has no intention, the listener has intention.
Xu Yun is not a student of urban planning or engineering design. If he heard this sentence in normal times, he would probably nod his head vaguely and believe it.
But today is different.
Xu Yun knew very well that there must be something abnormal in that area of the basketball court:
Either the air in the sky is special, or there is something underground.
Under this premise.
The maintenance man said that the smell in that area was lighter, how could he not think deeply?
Then Xu Yun thought for a while, turned his head and asked Guo Yuting:
"By the way, Xiao Guo, how did you conduct soil sampling?"
Guo Yuting bent down, took out a form from her backpack on the ground, and handed it to Xu Yun:
"If there is silt on the inside of the pipeline, then the silt must be scraped. If an obvious cluster of cockroaches is found near the pipeline, such as a large amount of cockroach excrement, then you can fill in this form to report, and then the engineering team will use a drill to
Dig downward quantitatively.”
"Just wait until you dig to a certain depth and then sample the soil."
"The school is very generous this time. After all, specimens like this are indeed rare."
Xu Yun nodded clearly, almost understanding the process of Guo Yuting and the others.
Everyone who loves cockroaches should know this.
Cockroach excrement contains an ester substance called ezona, which can be measured with specific NAC test strips.
And the higher the concentration of this product, the faster the reaction, so it is still very simple to detect.
Therefore, Guo Yuting and the others' steps were to scrape off the mud if they could, and if they couldn't, just use test strips.
After detecting the activity traces of a large number of cockroaches, you can get on the excavator and dig out the cockroaches.
The distance between large sewage pipes and the ground cannot exceed 0.7 meters, and the depth of pipes in universities is generally between 1.5-5 meters.
The largest external main pipe is about 3-7 meters, depending on the school.
This depth is not very deep and can usually be reached with a vehicle equipped with a drill. The key lies in the skill of the pilot.
Although in this way, the cost will definitely be higher than purely manual drilling.
But just like Guo Yuting said.
A situation like the one at the University of Science and Technology where 99.99% of the cockroaches were eliminated and only the old nest was left untouched is a rare sight that has been rare in decades.
In the face of possible returns, what is the cost of mining?
Therefore, at the school level, HKUST still provides great support for soil sampling.
Then Xu Yun thought about it, a flash of determination flashed in his heart, and asked Guo Yuting:
"Xiao Guo, did you wear protective clothing today?"
"protective suit?"
Guo Yuting was stunned for a moment, then quickly answered:
"Yes, yes, Xu Shen, what are your plans?"
Xu Yun nodded heavily:
"I'm going to go down and have a look first. If it doesn't work, I'll get on the drilling rig. I always feel like there's something good down there."
Guo Yuting hesitated for a moment, turned her head and looked at each other with her two companions, and said slowly:
"That's okay"
The maintenance engineer has checked the condition inside the pipeline, and the pipeline is also in a state of precipitation at this time.
Unless the University of Science and Technology was once called Hogwarts, and there was a secret room under a certain women's bathroom with a basilisk that liked to wander along the sewer pipes, Xu Yun didn't have any safety issues.
At the same time, considering Xu Yun's current influence within the University of Science and Technology, there is no problem at all in mobilizing a drilling rig to cut off the situation first and then report later.
Therefore, Xu Yun soon changed into a set of protective clothing.
This set of chemical protective clothing is specially customized by the University of Science and Technology. It has very good toughness and is of much higher quality than what is commonly seen on the market.
The head area is a gas mask, which can filter a considerable amount of harmful gases.
There is an oxygen tube similar to the size of an insecticide on the back of the chemical protective suit. This thing is mainly equipped for special situations. It may not be used even once in a hundred times.
There is also a simple tool bag on the waist, containing tools such as wrenches and screwdrivers.
After everything is ready.
Xu Yun wore a searchlight on his head and went down the well alone.
There is a very famous sewer museum in Paris. The interior of the entire sewer is an arch like a tunnel, and there is a lot of room for adults to walk in.
The sewer system of HKUST is somewhat similar to the Dejian sewer system in Jiaoao, which is of type ∧. It is one of the few universities in China that has ∧ sewer system.
After all, HKUST moved to the center of Luzhou by air, so many supporting facilities are of the highest standards in Luzhou.
Da da da
Xu Yun was slightly bent at this time, walking alone in this sewer.
The depth he is at is about five meters from the ground. At this depth, the latitude and longitude software can still be used.
31.8381
31.8387
five minutes later.
Xu Yun stopped.
At this time, his location is exactly at the center of longitude 117.2764 and latitude 31.8392.
Then he thought of what the maintenance man said, hesitated for a moment, and took off the gas mask.
as expected.
Although the pipes in this area are still filled with a damp and sour smell, it is at most the level of a street trash can.
It is far from the smell that a sewage outlet should have.
Then he still didn't wear the mask and took a few steps back.
As a result, it was only five or six meters in front and back, and the smell in the pipe suddenly became foul.
Xu Yun returned to the original place, calmed down, and chose to move forward this time.
It was also less than six meters away, and the stench intensified.
This is undoubtedly good news, as it means that the area is further shortened, and it also means that the "reward" is getting closer.
Then Xu Yun turned on the flashlight and started searching seriously.
trash bag
raw meat pieces
chicken bones
Xu Yun's eyes swept through the remnants one by one.
A few seconds later.
He suddenly stopped and fixed his gaze on the right inner wall of the pipe.
I only see this moment.
On the inner wall here, there is a ball of green moss the size of a computer screen.
Xu Yun stepped forward and lifted it gently with his hand.
The moss was motionless.
He had no choice but to take a step back, took out a small shovel from his tool bag, and gently shoveled off a small piece of moss.
Then he put the moss in his palm and shook it.
After pondering for a moment, he picked up a piece of minced meat from the ground with his gloves on.
This piece of minced meat was originally stuck in a certain gap. It had been soaked in various types of sewage for a long time and had already completely rotted.
It looked like it was possessed by a demon, and it also had an astonishing stench.
An ordinary person without any preparation would probably vomit on the spot.
Xu Yun then put the minced meat into the moss, wrapped the moss into a ball, and waited in place.
ten minutes later.
Xu Yun let go of his hand.
Take out the minced meat again, put it in front of your nose and smell it carefully.
After a while.
His heart twitched heavily, and he suddenly missed a beat:
This piece of meat, which originally had a strong stench, was wrapped in moss.
The smell dissipated by at least two orders of magnitude!
That is to say
this piece of moss
It has a certain purifying effect!
As for sterilization, deodorization or something else.
This requires careful research.
Actually.
What Xu Yun didn't know was.
In the area where he was standing, when the Cockroach Empire was at its most glorious, few cockroaches were willing to stay here.
Even Nanako is like this.
Because the rotten air has no place to stay here and must be purified