Yinshan is a collective name for several peaks, located on the western periphery of Jinyang City, about 20 kilometers from the city.

It used to be named after the silver mines, which were exhausted a hundred years ago and abandoned for a long time. Until more than 30 years ago, with the rapid expansion of Jinyang City, Yinshan was developed again, and the two lower peaks near the urban area became a place for citizens to visit nearby.

There are more than a dozen families living at the foot of the mountain, and some of them provide simple meals and homestay services.

On the civil map, Silver Mountain is just a simple and inconspicuous tourist attraction mark. But what is recorded in the archives of many forces is completely different, and they even do not hesitate to describe it in detail, because this is where the most famous and tight-knit private prison of the Jin family is located, and it is also the second target that Yi Ting wants to investigate.

Yi Ting mingled among several tourists, wandering among the two low peaks. It is said to be short, and it is more than 100 meters from the foot of the mountain to the top of the mountain. At the end of the walk is a small canyon with military barricades and warning signs. Finding a secluded place, Yi Ting raised his telescope to observe the main peak of the tallest Silver Mountain a little farther away.

This is the second day in a row that Yi Ting has come here to observe. Seeing that the sun was about to set, Yi Ting packed up and walked down the mountain.

At the foot of the mountain, an unexpected voice sounded.

"Boss Yi, oops, I miss me! But it's time for you. Mo Feiyang caught up with Yi Ting from behind and shouted.

"If the whole world knows I'm here, you can be louder." Yi Ting turned around a little helplessly and watched Mo Feiyang approach, and Wu Xiangqian and Chu Xiongan also came together.

"Let's talk about it when we go back to our lodgings." Yi Ting walked towards a B&B inn not far away.

opened three more rooms with fake IDs, and soon the four of them met in Yiting's room.

"This time, you guys rushed over, let's think about how to get into the Silver Mountain Prison together, and tell me about the information you have gathered." After each of them sat down, Yi Ting spoke first.

Mo Feiyang first motioned for Wu Xiangqian and Chu Xiongan to go out on guard, and then took out a miniature projector, and the white wall showed an image of the Yinshan area.

According to the data, Yinshan has a total of five peaks, the highest in the middle of the main peak, with an altitude of 350 meters, and the remaining four peaks are between 120 and 250 meters high. The two peaks to the east and south of the main peak belong to the civil open attractions. The peaks to the west and north are home to more than 200 special forces. This is the first hurdle we have to face. ”

"After arriving at the main peak, only due west has a 10-meter-wide and five-meter-high entrance, and it is also the only entrance, and identity verification and DNA identification are required to enter and exit, which is the second hurdle we have to solve."

"The prison is located about 400 meters underground, and you need to take a special passage to go down, and there will be 10 sentry posts after exiting the elevator, and you are required to check the dynamic password that changes every two hours before you can enter the prison administrative floor, which is the third level."

"In the administrative building, you need to provide the Jin family's instruction certificate, written and electronic certificates, and then exchange them for a special prison pass, and you can enter the prison. This is the fourth level. ”

"If there is an abnormality in any level, the alarm will automatically alarm and enter the emergency state, and all kinds of protective devices will be automatically opened, for abnormal situations," Mo Feiyang didn't breathe, paused, "Don't talk about killing!" ”

Yi Ting touched his chin and listened to Mo Feiyang's presentation with a flat expression.

"Are there any plans for the design or architectural structure of the prison?"

"The structure diagram belongs to the top secret of the Jin family, maybe it has been destroyed a long time ago, and there is no way to get it." Mo Feiyang shook his head.

"You said before that this prison was converted from the original silver mining cave, but what about the previous silver mining cave or road map?"

"It's useless, there are four passages under the main peak leading to the other four peaks, which have long been filled."

After Mo Feiyang finished speaking, both of them fell silent. After a long time, Yi Ting spoke again.

"There are always flaws, but we haven't found them for a while, there must be a way, I don't believe that no one can get in." Yi Ting touched his chin and muttered to himself thoughtfully.

"There was a real person who entered." Mo Feiyang heard Yi Ting's muttering to himself, and suddenly replied.

"Oh? Who? ”

"The Evil Wolf King, the number one mercenary."

"How did you get in?"

"Frontal assault."

"......" Yi Ting froze, "What kind of cultivation did he do at that time?" ”

"It should have been three years ago, when I was still a high-level martial artist." Mo Feiyang added, "At that time, Yinshan Prison was not as heavily guarded as it is now, and it is ,...... But it's hard to say, after all, the wolf king is now a martial artist,...... By the way, strictly speaking, the Evil Wolf King did not enter the prison, and somehow made peace with the Jin family at the entrance of the ground. ”

"Think about it slowly, let's arrange a meal first." Seeing that it was getting late, Yi Ting said.

The owner of the B&B inn also runs a restaurant, and the four of them walked to the small restaurant on the first floor, picked a table and sat down, Mo Feiyang ordered a few small stir-fries, and soon the dishes were served.

Mo Feiyang, who was not happy with alcohol, had to ask for another bottle of the best liquor in the store, and forced everyone to pour a glass.

Eating and drinking, everyone was silent for most of the time, and they hadn't drunk for a long time, Yi Ting's face turned red.

"Eat and drink Lazar, eat and drink Lasa,......" Yi Ting suddenly stared at the wine glass in his hand and was stunned, and there were words in his mouth.

"What's wrong with you, boss?" Mo Feiyang looked at Yi Ting's strange performance curiously.

"We missed the prison's living facilities!" Yi Ting drank the wine in one gulp, "There must be vents and sewage channels." ”

Several people hurriedly finished their meals and returned to their rooms again to check the topography map of Silver Mountain.

Seeing a small river marked on the map, Yi Ting's eyes lit up: "Feiyang, the three of you will immediately go and get a few sets of diving equipment, one large and one small two vehicles, a few rocket launchers and two machine guns, by the way, there are also high-power cutting machines, they may all be used tomorrow." ”

There was a little drizzle that night, and the silver mountain was only a faint black outline in the night. Yi Ting came out of the inn, holding the umbrella of the borrowed inn, and walked towards a small river two kilometers away, and soon disappeared into the night from a few faint street lamps on the road.

Cold, rainy weather with little to no one else in the wild. Yi Ting put away his umbrella, put on a set of raincoats, and began to explore along the embankment of the small river.

When the spiritual power penetrated into the water, the distance that could be explored was significantly reduced, but the river was not deep, and Yi Ting walked all the way easily.

After walking about two kilometers, Yiting made a discovery!

A bend in the river channel was detected to have water flowing out, and to Yi Ting's surprise, the water outlet was only a steel pipe with a size of more than ten centimeters, which could not be dived in at all!

Is it possible that the prison only has such a small drainage channel? Yi Ting's doubts were soon answered, and a total of twenty identical drainage pipes were found on the embankment less than 500 meters.

What a rigorous design! Simply impeccable! No wonder the Evil Wolf King could only choose to attack, Yi Ting had no choice but to return to the B&B inn first.

Unable to sleep under the distress, Yi Ting simply meditated and practiced the body quenching exercises. Originally, the Huo family's quenching exercise method was to absorb energy from the top of the head and merge it into the existing true qi in the body for quenching, but Yi Ting's improved exercise was to absorb the top of the head, both palms and both feet at the same time, and the efficiency could not only be doubled, but increased several times.

Two hours later, Yi Ting finished his work and suddenly realized something. Since the exercises can flow into the sea, in turn, the big rivers will also diverge into streams! In other words, it is highly likely that the prison's drainage pipes are divided into small pipes in the outermost range!

It must be so, there is no reason to design twenty different drains directly from the prison. It depends on how long the distance of the small pipes is.

Yi Ting simply rinsed off the body stains caused by less and less quenching, took out a pen and paper and began to draw and measure. Soon a semicircle with a diameter of 500 meters was presented on paper.

"There are 20 pipes within 500 meters,...... The few pipes in the center are certainly the closest to the big pipes,...... The length of these small pipes should be between 100 meters and 250 meters,"

“…… Just dig along the small pipes to reach the prison's real big drain! …… And the laying of the pipeline must be dug first and then landfilled, and the soil will not be too tight,......"

"Buried pipelines belong to civil projects, and there may be clues!"

Yi Ting thought about it and occasionally muttered to himself. Suddenly, find a disposable phone and dial it as soon as you turn it on.

"Feiyang, find a way to check the construction drawings when Yinshan was developed into a scenic spot, especially the design and construction drawings of the drainage system!"