Whew-

Lu An put down the plastic standard box, straightened up, and breathed a long sigh of relief.

"Alright, it's all packed."

Su Ruyu happened to enter the door at this time, and said with a smile when she saw this: "It's hard!" ”

Lu An shrugged his shoulders and asked instead, "Have you packed your things too?" ”

"That's right, after tomorrow's rest, I'm going to try the methods of the year, the conditions here are simple after all, and it may not be possible to succeed."

Lu An raised his eyebrows when he heard this, and asked again: "What are you going to do, how is it mysterious?" ”

"Oh, let's talk about it when we succeed, if we fail, how embarrassing it will be, I won't talk about it then. Actually, I'm just a little curious, but after I made all the derivatives of PTDX-89752 according to my mentor's idea, my mentor stopped researching it. Obviously, I had verified most of it at that time, but I had to give up halfway, and I was still a little unwilling at that time, especially the last three ......"

Su Ruyu suddenly stopped as she spoke, and just said to Lu An with a smile: "Speaking of which, thank you, now the samples of PTDX-89752 are already very scarce, and even if I had the heart before, I was powerless." ”

Lu An waved his hand and sighed, "This is not something to be thankful for. ”

"By the way, Dr. Su, what was your research back then? How could it suddenly occur to think of working on such an inconspicuous military emergency sedative? ”

Although Su Ruyu and Lu An had revealed their real names to each other before, the habits they had been using for months could not be changed for a while, whether intentionally or unintentionally, Lu An still called the woman in front of him who didn't know her surname and only knew her name "Momo" Su Ruyu, and Su Ruyu still called Lu An Li Yi.

Although Lu An seemed to ask casually, his heart was actually tense, and he was now desperate to know everything about PTDX-89752, and his sister Anna's fake death was suddenly overshadowed and mysterious.

In the past, although Lu An knew that his sister Anna's fake death was caused by the overdose of the military emergency sedative PTDX-89752, he had no intention of pursuing the deeper cause.

For example, why did Anna overdose on PTDX-89752, a military emergency sedative, and how was the critical situation that caused the people around Anna to make such a cruel decision about a child. After all, as long as the dose of this medicine is slightly larger, it is not as simple as suffering from suspended animation, but a direct lethal dose.

Over the years, Anna has been hovering on the edge of life and death, and the roots are all in the name PTDX-89752.

For example, since Anna was injected with a large dose of PTDX-89752, if she had been suffering from suspended animation since she woke up, why did she become ill for the first time in two years after coming to Earth? Who saved her in the first place?

Lu An clearly remembered the scene when her sister was brought to her eyes for the first time, a puff of golden hair covered the face of the little girl with her head down, her complexion was as white as milk, she was cowering and her expression was depressed, and even at that time she was still trembling slightly, as fragile as a porcelain doll that would break at the touch of a button.

It wasn't until she heard that this was her father's adopted daughter and stepped forward to hold her father's gift with her own hand that she quickly raised her head and glanced at herself, and then lowered her head and grabbed her hand timidly.

At that time, although Anna was as weak as an abandoned little mouse, she was not at all like someone who had just been stricken with a fake death disease.

Therefore, Lu An has always guessed that Anna was in the "Titan Fortress" with her father, her biological father, whose real surname is Jesslot, who unfortunately suffered a turning point in the last interstellar war.

His father Lu Yingbang led the 2nd Independent Task Force Fleet to carry out the "Space Assassination Plan", raiding the hub of the Outer Planet Defense Alliance-Titan Fortress, and after the fierce battle, his father found Anna who had been injected with an overdose of PTDX-89752, and at this time, Mr. Jeslot, who was the supreme commander of the Titan Fortress, had committed suicide, so his father had to adopt the poor war orphan.

As for why Anna was overdosed with PTDX-89752, it was probably her father who was trying to protect the girl who was unfortunately involved in the war?

There is nothing doubtful that PTDX-89752 was not only a universal emergency agent for the United Space Fleet of Earth at the time, but also a universal emergency agent for the Outer Planet Defense Alliance.

Lu An once asked Anna what it was like when she first met her father, Lu Yingbang.

Although Anna was vague about why she was in the Titan Fortress, she only said that something had happened in her family, and Lu An guessed from her expression that it might be a change between her parents, so she simply vaguely passed the past, but she heard Anna tell her story in detail about the situation of her first meeting her father Lu Yingbang, which was indeed after the 2nd Independent Task Force broke through the Titan Fortress and after the death of Mr. Jeslot.

Lu An always thought that it was his father Lu Yingbang who woke up Anna and cured her of the sequelae of overdose of PTDX-89752, but later because of his father's sudden death, Anna, who had not had time to be completely cured, suddenly fell ill after two years.

Curing Anna's fake death is also inheriting his father's mantle, Lu An has always believed so.

However, when Lu An came to the 273 asteroid by accident, personally boarded the wrecked warship that his father was on that year, and saw the suspicious PTDX-89752 in the emergency medical room, the speculation about those past histories began to waver in his heart.

Now Lu An urgently needs more information to confirm his guess about that period of history.

"The research of the year......" Su Ruyu narrowed her eyes, sighed a few times in a mysterious tone, and then replied lightly: "The research of that year, well, should have been after the war, and it was the tutor who was in charge of the laboratory who suddenly received such a task, in fact, the tutor was very unhappy at that time, her research at that time had been carried out at a critical moment, but then I don't know why she suddenly changed her mind and took me to study with a few other students, but after a while, she seemed to have suddenly lost patience and interest, I pushed the whole project out, but at the time I felt that I was only one step away from completing the research......"

"As for what you just said, this inconspicuous military emergency sedative, hehe, then you really don't know anything."

Su Ruyu smiled, shook her head, sighed, and continued: "This inconspicuous military emergency sedative is really the biggest misunderstanding of PTDX-89752, although it has long been eliminated, no, rather deliberately sealed, but I also heard from my mentor when I was researching at that time, and PTDX-89752's life experience is really not ordinary." ”

"Huh? Not ordinary? Is there anything amazing about his background? ”

When Lu An heard this, he was very surprised.

"Well, have you heard of the two world catastrophes before the galactic epoch?"

"Before the Galactic Era? Two World Holocausts? Lu An stared blankly at Su Ruyu and asked.

Su Ruyu explained softly: "Actually, I don't know very well, but I heard the mentor mention it once, it should be said that there were two large-scale disaster events for human beings before the galactic era?" ”

"Well, literally, that's true."

"The mentor just mentioned it casually at the time, and the meaning of her words was probably that after the two catastrophes, there was a pattern of the human world after the galactic calendar, and the original great alliance wave should have a deep relationship with these, but the mentor should not be very important, and she is also vague."

"Well, PTDX-89752 has something to do with these two world catastrophes?"

"Yes, although the mentor doesn't seem to know the specific face of these two world catastrophes, PTDX-89752 does have something to do with the second incident, and the mentor said that PTDX-89752 This type of potion is actually a remnant of that era, and many things from that era have been deliberately annihilated, but PTDX-89752 has become a fish that slipped through the net because it was used in the army and the scope of use was very narrow."

"Elixir? Caught in the net? Lu An remembered some prehistoric information that he had been exposed to before, and vaguely understood, and he asked softly: "Could it be that the catastrophe is the second event, is there some major plague or epidemic on the earth?" At that time, human beings only had one settled planet, the earth, and it was not impossible for a large-scale severe plague to occur. ”

In fact, Lu An had seen some so-called fantasy art, with various stories about the extinction of the human world, but for Lu An at that time, these stories were boring and scary, not to his taste, and he preferred all kinds of books with interesting illustrations. Now, after Su Ruyu's prompting, he suddenly remembered this.

Perhaps the stories of those people are just exaggerating the background, and that humanity is indeed not extinct, but it has also suffered heavy losses, so it is called the "World Catastrophe"?

"Who knows, but it's very likely, maybe there was a large-scale plague in the human world at that time, and it was difficult to eradicate it with traditional chemical agents, so this kind of directional smart medicine was used......"

Su Ruyu shrugged, noncommittal to Lu An's speculation.

"Directional smart potions?" Lu An wondered again.

"Well, it's PTDX-89752 that can be directed to certain parts of the human body, rather than through a series of complex physiological and chemical reactions in the human body like those ordinary chemical agents."

Lu An blinked and said, "Is it controlled by remote control?" Well, if it's intelligent, can it make its own judgment and even treat it? ”

"Probably, but PTDX-89752 certainly not. So I later guessed that the mentor was interested because of this, and lost interest because of this, and now that I think about it, the tone she told me at that time is not a pity! She's definitely looking to see that kind of real directional smart potion......"

However, if the face of history is always in speculation, it will only become more and more obscure, and it will never become clear.

The history of the past is gone forever.