The prison had more than 3,000 inmates, yet just because Li Shutong wanted to give his student more time to train, he simply stopped all of them from coming out.

It was as if the prison's existence was for Qing Chen.

After Li Shutong went to bed in his room, Li Shutong exclaimed, "Our boss is still as stubborn as ever."

Ye Wan thought about it and said, "After all, Qing Chen is Knights' only hope right now, so it's not a surprise that the boss would do everything he can."

"By the way," said Lin Xiaojiao, "I killed the two assassins you caught earlier."

Qing Chen, "?"

Lin Xiaoxiao added, "Don't worry, I got what we need before they died. It's the Qing Family's fourth branch coming for you, but we still aren't sure why."

Only now did Qing Chen notice that this smiling young man had a ruthless side.

He was ruthless toward the enemy and kind toward his friends.

At this time, Ye Wan suddenly said, "There is one thing that we have always found to be very strange. From what we can tell, it seems that the elders of the Qing Corporation know your existence, and you even have a marriage arranged with the Kamidai Family. But the problem is that few people outside have heard of you. Before you transmigrated, you were the only descendent who was never involved in any corporational activities and was never seen in public."

Qing Chen frowned, "Maybe because I'm not important, and no one wants to care about me?"

Lin Xiaoxiao shook his head, "If we assume that, then how were you able to replace the third branch to enter the Fight for the Shadow? If you are important, then how come even decedents from the side branches get more attention than you."

"Besides," said Ye Wan, "I can't find any information about you on the internet, almost like you don't exist. It's not that you aren't famous, but that someone deliberately erased something. It's paradoxical.

After that, Ye Wan and Lin Xiaoxiao looked at Qing Chen.

Qing Chen raised his eyebrows and said, "What are you looking at me for? I don't know what's going on either."

"Whatever, you're so boring," said Lin Xiaoxiao disappointedly as he walked away, "I've been curious about this for a while now, and I thought you would be able to give me an answer."

Ye Wan said, "No time to waste, we should start training. Before we start, I want to restate what Boss said earlier. Life is indeed extremely fragile, and just knowing one method is enough for you to kill a person."

Sternum rupture could result in obstructed breathing, ruptured alveoli, and ultimately suffocation.

Spleen rupture would lead to fatal bleeding and can result in death in a short period of time.

So targeting any part of the body with enough force would be able to make the opponent incapacitated.

However, the times have changed, and many fighters could rebuild themselves in order to reduce the damage from fatal hits.

Some would implant a biomimetic alloy skin around the neck area to prevent the enemy from cutting their throats.

Some would also modify their joints so that they could withstand more impact.

But there was a place that was often overlooked by mechanical fighters: interior organs.

Qing Chen felt that something was wrong there, "Hold up, if everyone knows that organs are the most important and fragile parts of the body, it would only make sense that people implement biomimetic skin there."

Ye Wan said, "Oh, that's because the biomimetic skin was very expensive. One square centimeter costs over a hundred thousand dollars. Under normal circumstances, only a few people could afford to protect their organs, simply because organ surface area is too large."

Qing Chen was shocked, so it's wealth that limited people's capacity?

Ye Wan continued, "From what you told me, the mechanical limbs that the thugs have aren't the best, so they probably don't that organ protective measures."

In other words, Ye Wan meant that they probably were too poor to afford large areas of biomimetic alloy skin.

"The spleen is different, mainly because of its rigid positioning. It's not protected by the spine nor the ribs, and it could be stabbed from the front or the back." Ye Wan explained, "Most importantly, very few people know how to properly protect it."

As long as one was stabbed in the spleen, then the person would almost definitely bleed to death.

"Will you be able to get a blade after you get back?" asked Ye Wan.

Qing Chen thought about it and said, "Will a fruit knife work?"

"No," said Ye Wan, "If it's an ordinary fruit knife thats not sharpened, it won't even pierce the jackets."

As he talked, he walked up to the sixth floor, opened an alloy door, and took out a switchblade from one of the cell rooms.

The prisoner of the cell was still asleep, and when he was woken up by the sound of the door opening, he just sternly saw Ye Wan coming in, taking the knife, and leaving. Every motion was smooth and natural.

Ye Wan placed the palm-sized switchblade in Qing Chen's hand, "You should be able to bring items back, so use this to fight."

Qing Chen was stunned for a bit, "Can't you give me something more advanced?"

Ye Wan shook his head, "Boss won't allow it."

"So, should I practice with this as well?" asked Qing Chen.

"Yep," nodded Ye Wan, "You not only need to be familiar with the methods of attack and defense but also with your weapon."

"Got it, so what are we going to do now?" asked Qing Chen.

"To attack accurately, you first have to know your target well," said Ye Wan, "But because everyone's height, weight, and bones are different, their vital points might also be different. You need to kill a lot of people as practice before being able to find the exact spot every time."

Ye Wan then handed him a pair of glasses, "Use them for night vision."

Suddenly, the entire prison went dark.

Ye Wan brought Qing Chen to a cell, and after the alloy doors were opened, Mom Ye went in first to press the prisoner solidly in the bed, much like when he was holding Liu Dezhu down.

He didn't care about the struggling prisoner but pointed toward a spot under the prisoner's ribs and said to Qing Chen, "Look, this is the vital spot for his spleen. One stab here is enough to take his life."

Then, Ye Wan brought Qing Chen to the next cell.

To save time, he didn't say anything unnecessary.

Again, he held down the terrified and confused prisoner while explaining to Qing Chen how this person was different and why.

From 1 to 6 in the morning, Ye Wan spent 5 hours walking Qing Chen through the entire inmate population.

Qing Chen felt like he was learning anatomy, but unlike ordinary medical students, he had more than 3000 real bodies to gain more experience.

For Qing Chen, it was a fulfilling night.

But for the other prisoners in Prison 18, it was a horrifying experience.

They all experienced almost the same thing: Their cell doors suddenly opened, and it was pitch black outside.

Then a man powerfully pressed them against their bed and said, "Look, this is where his spleen is. Stab here and he'll be dead."

It was more frightening than watching a virtual reality thriller.