Rong Yu: "...If this were a straight track, the last place would be impossible to overtake, because he is already the last one. How could anyone possibly overtake him? If you really see something overtaken, then the last place person should really go to a temple to burn incense."

"Fortunately, the premise of the question has changed. Now, a group of people are on a circular track. So, the person who can overtake the last person must have already run one lap. And the question requires that the person who is overtaken 'first' must be the fastest person in first place!"

Rong Yu said, "So the numbers from the four brain teasers combined are: 21916."

After Rong Yu finished speaking, Hua Yun was about to press the number when Rong Yu said again, "Wait, I just found an envelope. Let's take a look at it while this electronic button is in use."

As Rong Yu spoke, she took out the pink-covered letter, which had the words "Lucky Card" written on the front.

Rong Yu quickly opened the envelope and took out a piece of white paper from inside.

At the same time, Rong Yu also saw a string of red words on the white card: To activate this lucky skill, you need to complete the following tasks first:

Run towards any of the game players with your toes pointing inward, then jump up, hug their neck with both hands, wrap your legs around their waist, bury your head in their neck, and say in the sweetest voice, "I'm so scared!"

Note: Once you receive this card, you are automatically considered to have accepted the task. If you fail to complete the task within the specified time, you will be punished.

Rong Yu, after reading the mission details: "..."

Rong Yu silently handed the card to Hua Yun: "Young Master Hua, do you see anything strange about this card?"

Hua Yun didn't think much of it and took it casually, but when her eyes fell on the task details written on the card, she suddenly froze.

But it was obviously too late. He had already met the prerequisite of "getting the card," which meant that if he did not complete the task within the allotted twenty minutes, he would be punished.

Just then, Yang Ji asked curiously, "What does it say on the lucky card?"

Without saying a word, Hua Yun handed the card to Yang Ji.

Yang Ji naturally accepted it.

Yang Ji, upon seeing the task requirements on the card: "..."

Now all three of them have to complete this bizarre task.

Yang Ji exclaimed sincerely, "Is this what they mean by sharing hardships?"

Hua Yun thought for a moment and shook her head: "To be honest, it's like one person isn't enough to get into the water; you have to drag others along to feel satisfied."

Rong Yu quickly entered the five numbers into the electronic door, and a green light flashed on the door, indicating "Password correct".

Rong Yu pushed open the door and saw lights flickering in the distance, sometimes bright and sometimes dim, but enough to be a ray of light in this dark corridor.

Yang Ji immediately shouted, "Old Liu! Is that you?"

The sound carried far away, and the lights on the other side paused for a moment before shining in their direction, accompanied by a voice: "Old Yang! Where are you?"

Yang Ji: "Here! Here! You have flashlights! Come over here quickly!"

Soon, the flashlight beam drew closer, and after many hardships, the nine people finally met in this narrow space.

"This episode was really too dark. The darkness has destroyed my ability to think. I feel like my head is buzzing right now, and I can't even remember what I'm supposed to do," Yang Ji complained to Liu Qingling.

Yin Chengjue's gaze swept over Rong Yu several times to make sure she was alright before he spoke, "Based on the clues we've gathered along the way, we can roughly piece together the following backstory."

Yin Chengjue: "Dr. Fu sent letters of commission to the detective agency and the treasure hunting team respectively, which led to each of them sending three people over. However, after they came in, they were attacked."

Yin Chengjue: "And here, there are three other people who did not receive Dr. Fu's letter of authorization or invitation. They came here on their own initiative and were accidentally locked up. So they want to escape, but they find that the doors and windows they came through are sealed off. It will obviously take them some effort to escape successfully. So now we have a total of nine people: three on the detective route, three on the treasure hunt route, and three on the escape route."

“In addition, we also found Dr. Fu’s laboratory. In their laboratory, we saw the research direction of this underground laboratory.” Liu Qingling said, taking out the experimental report, her tone mysterious: “What I’m about to say will definitely shock you, so you all better listen carefully!”

Yang Ji couldn't help but punch Liu Qingling on the shoulder: "Stop keeping me in suspense! Tell me already!"

Liu Qingling rubbed her shoulders and said, "Inside this underground research institute that has been abandoned for ten years, they are actually researching how to modify human genes. They want to make human genes better."

However, although the starting point was good, the experimental process went wrong, causing the mice injected with the modified cells to exhibit a manic attitude.

This was undoubtedly a failed experiment. In principle, those things should have been destroyed, but due to the negligence of the guards, the white mouse injected with the modified cells accidentally escaped!

The frenzied white rats ran incredibly fast, their teeth became sharper, and they bit anyone they saw.

Soon, those bitten by it began to show similar symptoms, plunging the entire underground laboratory into chaos.

This was undoubtedly a virus infection event that spread extremely rapidly.

In order to prevent the infection from spreading further, Dr. Fu activated the advanced security system of the underground laboratory, quickly sealing off and isolating the entire laboratory.

This approach does indeed block the source of danger and isolate the area from the outside world, but at the same time, it also completely seals this place off, turning it into a living hell.

The infected people seem to have a purpose, launching attacks on those who are not infected until the other party also becomes infected with the virus, at which point the attacks will stop.

People infected with this virus can recover quickly even if they are injured, and their strength is significantly higher than that of a normal person. Other physical indicators also increase significantly.

Of course, his intelligence level has declined significantly, like a beast that can no longer think.

Noticing this, Dr. Fu gathered some of the experimental team members in the laboratory who had not yet been infected and began to study the situation.

They felt this would be a breakthrough, because once they overcame the negative effects of these modified cells, and simply modified the human body, such a body with extremely fast self-healing speed would obviously be something many people dreamed of.

So Dr. Fu had the infected people locked up in one place, intending to use them as guinea pigs.

However, due to the recent viral infection, superiors were concerned about its potential for greater repercussions and ordered the laboratory to be closed, with Dr. Fu immediately halting all current research.

But how could Dr. Fu be willing to do that? In Dr. Fu's view, he had worked so hard for so long and was seeing some breakthroughs. As long as he could overcome a few difficulties, he would succeed.

Therefore, he completely disregarded the superiors' requirements, merely sealing off the laboratory on the surface while secretly continuing his research behind the scenes.

"...In short, this is a heartless and insane doctor," Liu Qingling concluded. "This laboratory has not been abandoned for ten years at all. Dr. Fu is still secretly conducting research in this laboratory, and he is researching people who have been infected with the virus and whose bodies have mutated. He keeps them here and treats them as his own children."

“Oh, right!” Wei Shu added from the side, “We are now looking for Dr. Fu’s ultimate test subject.”

Yang Ji was puzzled: "The ultimate experimental subject?"

Wei Shu: "Yes, we saw records in Dr. Fu's lab that he has now cultivated three ultimate genetically modified cells. He needs to inject these three ultimate genetically modified cells into his most satisfactory experimental subject in order to create an ultimate experimental subject. In his vision, that experimental subject should be able to retain the mind of a human being, and will not lose its mind like other people and become an animal that can only howl."

Upon hearing this, a strange light flashed in Rong Yu's eyes, but he concealed it well. "Then how should we find it? To be honest, the three of us were actually on the run all the way here. There were a lot of mutants over there, and we were chased by them the whole way."

The guard exclaimed in surprise, "Wow! That's terrible! We only encountered one on the road, and then we didn't see any more. There are many rooms along the corridor, and we're busy searching for clues."

Yang Ji was on the verge of tears as he listened: "Your work is so simple and unpretentious, why did you have to choose me to go through all that? With my old arms and legs, I still have to run around with that group of people."

Liu Qingling asked curiously, "Can't you not run?"

Yang Ji: "When a group of people are yelling and chasing you from behind, shouldn't the normal reaction be to run away as fast as possible? Looking at their ferocious faces, they don't look like they want my autograph at all."

Yin Chengjue's gaze fell on Hua Yun: "Young Master Hua, we've already shared our experiences along the way. What about your side? Besides seeing many mutants and being chased by them, have you encountered anyone else?"

Hua Yun: "For example?"

“For example…” Yin Chengjue narrowed his eyes slightly: “Did any of you three encounter Dr. Fu? Did Dr. Fu say anything to you, or do anything?”