For two hours, Xiao Yu walked through every corner of the underground base.

There was not a single figure in the entire underground base, not a single superfluous thing, nothing but a large number of rooms and some furniture that could not be moved.

Any evidence that there was ever a human being here was carefully cleaned up, not even a single hair remained.

Finally, he sat on the floor of the small room where he had once lived, bowing his head in contemplation.

In Xiao Yu's mind, the large black curtain wall had completely cracked apart, turning into fragments of memory.

Now, almost all the memory fragments have been stitched together, from the time he woke up in this underground base to the time he escaped from the underground base on that bloody night, everything that happened in the past ten years is vivid.

His name was Ye Fei, and this was the name he found on the nameplate around his neck after he woke up from here.

Although he didn't know if the name was his real name, until he regained his earlier memories, let's leave it at that!

I don't know when this underground base was built, and I don't know who the owner is, everything seems so mysterious.

In this base, in addition to more than a dozen instructors, there are two groups of people.

One group is Xiao Yu's heart group, there are about thirty people, and the other group is the blood group where 'Shadow' is located, with a relatively large number of people, more than two hundred people.

The people in the heart group are all boys of the same age as Xiaoyu, but the blood group is both male and female, compared with the heart group, the age difference between the members of the blood group is relatively large, the older ones are twenty or thirty years old, and the younger ones are like Xiaoyu and 'Shadow' The age of the little kids.

All of these people have one thing in common, they have all lost their memories of the past after coming to this underground base.

The main training content of the heart group is to fly mechas, while the training content of the blood group is fighting.

In the underground base, every once in a while, several people in white coats will test their fusion with special instruments.

Although Xiao Yu didn't know what this fusion level meant, he just knew that the members of the heart group would generally have two opportunities to fuse, and each time they fused, the ability of the brain domain would increase significantly, and the ability to control the mecha would be significantly improved.

In addition, according to each person's physique, the degree of integration is also different, the first fusion, can have 10% of the degree of fusion is already good, and the second fusion, the degree of fusion will be slightly less than the first time, after two fusions, if the total degree of fusion can reach 20%, it is enough to rank in the top five of the heart group.

Most of the boys in the heart group were fused twice, and the fusion degree was about 10-15%, and they were basically fused twice at the age of fifteen.

There is only one person excepted, and that is Xiao Yu.

Xiao Yu is a special case, when he was fifteen years old, he didn't even start his first fusion.

You must know that the level of fusion is directly related to the flexibility of the mecha, some high-level mecha have very high requirements for the driver's brain domain, if you can't meet the requirements of the mecha's brain domain to forcibly control the mecha, the driver's head will explode like a watermelon due to excessive pressure.

They didn't know who created these terrifying and delicate humanoid machines, and even the instructors who guided them in practice didn't know that all they could do was to constantly enhance their brain domain abilities and strive to be able to control higher-level mechas.

To Xiao Yu's surprise, in the base, only the people of the heart group could control the mechas, not even those instructors. He had seen with his own eyes that an instructor had violated the rules by trying to pilot the 'Hami' mech, and when someone else freed him from the mech, his head had been blown into a rotten tomato.

Those boys were only able to pilot the worst model of the mecha 'Hami' after the first fusion, and when Xiaoyu learned to fly 'Hami', he didn't start the first fusion.

Although the degree of development of his brain domain is not as good as that of those boys who have been fused, it is far more than the degree of brain domain development of those boys before fusion, and it is amazing that as he grows older, Xiaoyu's brain domain is also increasing at an alarming rate.

Those in white coats used to specialize in the freak of Xiao Yu, but they found nothing, maybe it was the boy's innate ability, no one knew when his first fusion would begin, and they didn't know what height his brain domain ability would reach after two fusions.

It's a pity that Xiao Yu's fusion has not come for a long time, and by the end of the second fusion of other boys, his brain domain ability has lagged far behind everyone in the heart group, when others control the 'Qing Ming', he can just control the 'Yu See', and when others control the 'Blue Moon', he has just learned to control the 'Qing Ming', which is a level behind others.

Those white coats have long given up on the study of Xiaoyu, because their information shows that if they don't start to integrate before the age of 15, then there will be no chance of integration in this life.

Xiao Yu is just a failure in this experiment, and the probability of failure is one in thirty, in their opinion, it is still within an acceptable range.

Only Xiao Yu knew how hard he had put in his practice, almost every practice had reached the limit of his brain domain, and he had endured the pain that ordinary people couldn't bear, because, he didn't want to be called a 'waste', he wanted to show those boys that even if he didn't fuse, he could still control the mecha!

In the eyes of almost everyone, he struggled to survive because he had a 'shadow'.

In his eyes, he has long regarded 'Shadow' as his only relative in this world, 'Shadow' is his protector, she always appears when he needs help the most, so that he can avoid the bullying of those boys.

In front of Shadow, the boys had no choice but to retreat, because Shadow was the best member of the blood group.

The members of the blood group also had two chances of fusion, but the result of the fusion was not the same as that of the heart group, and they enhanced their physical fitness.

The average degree of fusion of the blood group members after two fusions was 22%.

'Shadow' has only fused once, and her fusion degree has reached 40%, which is much more than the members of the blood group who have fused twice, and the potential is unlimited.

One can imagine how strong she will be when her second fusion comes!

As 'Shadow' grows up day by day, her appearance becomes more and more beautiful, and her martial arts become stronger and stronger, but in the hearts of everyone in the blood group, she is an untouchable god of war, and even when she is training, few people dare to challenge her.

Those boys in the Heart Group believed that with the strength of 'Shadow', even if they drove a mecha of the level of 'Lanyue' to fight her, they would definitely lose.

And 'Lanyue' is the limit of what they can control the mecha after their second fusion.

Among the mecha in the entire base, there are as many as three or four mecha above the level of 'Lanyue', and the higher the level of the mecha, the more well-made, the more perfect the weapons equipped with it, and the stronger the combat ability, of course, the higher the requirements for the driver's brain domain.

As for the only highest-level mecha in the underground base, the 'God of Killing', it has long been regarded by everyone as a god-like existence, and no one would think of piloting it, unless this person is impatient.

Xiao Yu sat there dumbfounded, sometimes smiling, sometimes painful, sometimes sad, sometimes excited, all kinds of feelings came with the experience of ten years, he couldn't forget the sense of success when he first drove 'Hami' in the training ground, he couldn't forget the happiness when he frolicked in the valley with 'Shadow', and he couldn't forget the grief and helplessness when he was separated from 'Shadow' in life and death.

All the memories made him feel as if he had re-experienced a reincarnation, and re-experienced the joys, sorrows, and sorrows of the past ten years.

Xiao Yu's thoughts slowly pushed back, and gradually, he focused on that bloody night.

That night, everything seemed to suddenly go out of control, and the people of the blood group did not know what stimulated them, and they all became crazy, their eyes were bloody, and they waved the sharp blades in their hands, and launched a bloody slaughter on everyone in the base.

Under the sudden attack, the people in the base rushed to the battle, and everyone, including those instructors, was almost slaughtered. After killing almost everyone, the Bloodband began to kill each other again.

Just when a katana was about to cut Xiao Yu's throat, 'Shadow' appeared, she was the only member of the blood group who did not go crazy, and under the protection of 'Shadow', the two fought and retreated, and came to the exit of the base.

However, the enemy was too crazy, and under the attack at any cost, 'Shadow' had no way to leave the base with Xiao Yu, so he had to kick Xiao Yu out of the door and block the pursuers alone.

In the last glimpse, Xiao Yu saw the figure of the 'God of Killing', although he didn't know who was controlling the 'God of Killing' at that time, but it was certain that it must be a member of the heart group who saw his companion being killed like crazy and lost his mind.

The fate of that member of the heart group must be very tragic, but what worries Xiao Yu is whether the 'shadow' will be safe and sound under the attack of the 'God of Killing' when this heart group member's brain bursts and dies.

But now, the underground base is empty, not to mention the 'shadow', 'mecha', 'killing god', even if there is no trace of the fight, Xiao Yu even wonders if all the memories he has recovered are just a dream?

Staying at the underground base until five o'clock in the morning, in a disappointed mood, Xiaoyu left the poppy valley.

Driving the Passat on the suburban highway mountain road, let the cool morning breeze blow outside the car window, Xiaoyu's heart could not be calm for a long time.

Finding the memories of ten years did not make Xiao Yu feel a little happy, more mysteries rose in his mind, and the life and death of 'Shadow' made him even more worried.

In his heart, he already had a vague conjecture about the ins and outs of the whole thing, in this underground base, some kind of secret experiment must be being carried out, and himself, 'Shadow', those members of the Heart Group, and the Blood Group were undoubtedly victims of this secret experiment captured by a powerful organization.

Of course, there are many unsolvable mysteries in his conjectures.

As far as he knew, with the current human technical ability, he might only be able to create a crude mecha of the lowest level like 'Habi', and a mecha of the 'Qing Ming' level or higher would definitely not be able to succeed.

In addition, the control method of this mecha is very special, it is all controlled by the driver's brain, and this technology that relies on brain waves to control such a huge humanoid machine contains a very high biotechnology content, which is definitely a height that all human technology cannot reach today.

And the huge underground base made entirely of special metals is also one of Xiaoyu's mysteries, who has such a great energy and can build such a huge underground facility?

The whereabouts of Shadow and the people in the base are the biggest of these mysteries, where did they go?

No matter how many mysteries there are in this conjecture, Xiao Yu hates the mastermind behind the operation of this underground base, it is he who has caused so many people to be separated from their parents, and it is he who has caused him to lose his 'shadow'.

"Be sure to find out who is behind this! Be sure to find the 'Shadow'! Xiao Yu stepped on the accelerator fiercely, and the Passat roared angrily and galloped away into the distance like a lightning speed.