Gu Siyin was a little dumbfounded.

Lin Wu tried to speak as tactfully as possible: "I know a little bit about making incense, and I have some dealings with the black market. By chance, I met Cheng Man, the successor trained by Xuanmen, and thus became acquainted with Cheng Wenwei. Well... he probably thought I was calm and reliable, and he trusted me, so he took the initiative to tell me."

Gu Siyin: “Ah…ah?”

Lin Wu nodded affirmatively.

Gu Siyin was a little dazed, and after digesting it, she said, "Yes. In fact, it was No. 49 who took the initiative to find Cheng Wenwei. Because No. 49 had made many inquiries and determined that Xuanmen also had some means to determine whether the people involved in the case were really dead, so he went to find them. I don't know what happened. They didn't talk to Yuan Fengrong in detail, but went to the Black Back Mountain in the northwest and saved Cheng Wenwei who was in danger of death at the time."

"No. 49 did not recruit Cheng Wenwei right away, but gave him time to consider. Not long after, Cheng Wenwei actually brought the mural to No. 49. Because the matter was too secretive, No. 49 asked Cheng Wenwei to keep it secret. Cheng Wenwei agreed, but only introduced Zheng Jingmin, the owner of Shixing, to No. 49. After many investigations, it was determined that Zheng Jingmin had no problems, and No. 49 also established contact with Shixing."

Gu Siyin paused, as if thinking back.

After a while, he said, "Later, No. 49 learned that the five elements were inexplicably threatened by a dried blood vine, so he tried to use their similar situation to win over the other elements. Everyone suspected that it was related to the '511' case, and most of them were recruited smoothly."

"However, No. 49 never found any clues about other survivors, and progress on the mural was slow, and no useful information was obtained. From what I know, three years ago, No. 49 suddenly learned from Shi Xing Zheng Jingmin that there was a kind of stone here, which was very special and seemed to be targeted by unknown forces."

"At that time, No. 49 wanted to investigate what was going on here first, but within two days, they suddenly issued an order saying that they were sure that the special stone here was a meteorite and could be used as an underground city. It was very important. So No. 49 sent six teams to retrieve the meteorite, but almost all of them were wiped out, and they only brought back a little."

Lin Wu frowned slightly.

It seems that the people Zheng Mingxian ran into three years ago were from the Huo family.

but……

"Where did No. 49 get the information to confirm that it was a meteorite? Did someone from the Stone Company tell them?"

Could it be that Shi Xing followed the Huo family to investigate at that time? "I don't know, it's not stated. But it's probably Shi Xing, after all, there is no other source." Gu Siyin said.

Lin Wu looked at her and said, "You don't know anything, but you sacrificed an entire team just for a few broken stones?"

“That’s not a broken rock.”

Gu Siyin said seriously, "After taking it back, No. 49 made an important breakthrough. One of them was to extract the substances in the meteorite. After countless experiments, a special reagent was synthesized and the content on the mural was deciphered. From this, we know that we are not the only highly intelligent life form in this world. There are other races, and they have extraordinary abilities."

Lin Wu was slightly stunned.

This refers to people like Lu Guichi in the dungeon.

She asked, "Is it the one in the underground city?"

Gu Siyin nodded: "According to the murals, the underground city is a very magical existence, all-encompassing and mysterious. But because the murals are incomplete, the information we get is limited. We only found that meteorites can be used as a barrier to resist the abilities of these unknown life forms. In addition, there are three things related to the underground city in our world! I don’t know what they are, but they seem to be very important to the underground city."

After hearing the second half, Shen Li's face darkened slightly.

This should refer to the three things that Lu Guichi is looking for.

"Does the mural contain information about where they are located?"

Gu Siyin shook her head: "The murals are incomplete. No. 49 took a long time to find. I can only barely confirm that one of them seems to be in a small quarrying town called Danmaya in Europe..."

"In the underground of Danmaya." Lin Wu continued.

Facing Gu Siyin's surprised look, Lin Wu said, "That's where I met Gu Shiqing."

Lin Wu's eyes fell on her hand, and he didn't struggle to get away for a moment. He said, "I'm fine. I went down... well, to save a friend of mine, and finally got out safely."

She said it lightly, and Gu Siyin thought it wasn't actually that dangerous, so she breathed a sigh of relief.

She then continued, "Yes, one of them is there. The higher-ups sent my second brother there to find it at all costs so that we can understand the secret of the underground city."

"At that time, No. 49 actually had a grasp of the situation. Based on the missions in recent years and the information found in various places, No. 49 suspected that there were unknown life forms in the underground city in our world, so he made the last bit of meteorite into a pendant and gave it to the second brother for self-defense."

"In fact, with my status as the second brother, I didn't have to go there in person, but the laboratory found that the meteorite contained a radioactive toxin. Not many people can carry it for a long time, and our Gu family is one of them. So the mission fell on the second brother."

"After that, the meteorites were all used up. But in order to be on the safe side, meteorites cannot be missing. So my sister was ordered to lead the team to Lingnan. Based on the experience of the predecessors, my sister put on the remaining meteorite pendant. If you get close to the location of the meteorite, the pendant will react and be used to determine the location of the meteorite. After all, the people who came to look for meteorites before have already... No. 49 has no exact location information."

That’s the past.

Later, Gu Siyin experienced danger, was seriously injured and fell into a coma, and could not remember what happened.

When I opened my eyes again, I saw Lin Wu.

The constant changes made Gu Siyin feel really dazed. She even believed that she was possessed by an illusion in that place.

Lin Wu felt strange: "Why is it okay for the Gu family to wear it?"

This reminded her.

When they were in North City, three families had all had accidents because of the pendant. But she had been wearing it for a long time and nothing happened. She thought that Gu Shiqing's pendant was made in a special way and would not have that kind of radioactive radiation toxin.

Gu Siyin hesitated, looked around, approached Lin Wu, and whispered, "My second brother and I discussed it privately, and I think it might be because of mother."

"...Teacher Chi?" Lin Wu was surprised.

Gu Siyin was stunned, wondering why Lin Wu called Chi Yangzhi like that.

But she didn't ask, and answered Lin Wu first, "Yes. You should know now that mother has some connection with the underground city. In fact, after my sister and second brother entered No. 49 and came into contact with so many things, they began to suspect that since there are things related to the underground city in the outside world, it means that someone had come out to build the underground city. Otherwise, where did they come from?"

"That's also possible. These people didn't return to the underground city in the end, but settled down in the outside world. My mother was one of them. But she doesn't remember it, or she doesn't understand it very well because she has lived in the outside world since she was a child."

This statement was simply earth-shattering, and Lin Wu suddenly understood everything! She had always been curious about Chi Yangzhi's origins before, and now it made sense! And the strange man who was in the welfare home with Chi Yangzhi might have the same origin!

"Oh, by the way," Gu Siyin held Lin Wu's hand and said nervously and carefully, "Wuwu, I have something else to tell you. But I don't mean to blame you, so don't think too much about it, okay?"

Lin Wu nodded. Gu Siyin said, "I learned from the funeral industry that there is a very important young man. After checking, I found that he has a close relationship with my mother. He and my mother grew up in the same orphanage, but there was a fire in the orphanage, which burned the files including my mother and the young man."

Lin Wu's eyelids jumped, and he had some idea of ​​what Gu Siyin would say.

As expected, Gu Siyin said, "My second brother and I talked about it, and we both felt that our mother might not be a real orphan, but something must have happened to her, forcing her to go to that orphanage and change her name, and... deliberately burnt the evidence with a fire."

"She grew up like an ordinary person, met my father, got married and gave birth to us. But eighteen years ago, my mother went to the North City without telling us because of something related to the underground city. We don't know why, but in the end, you were lost during childbirth."

She carefully looked at Lin Wu's expression and said, "In short, mother knew about the dungeon in the beginning, but she forgot everything about it because she was devastated by losing you and became mentally ill."