I really don't want to date a girl addicted to the internet!

"I was talking about a gift, not that kind of thing!" The boy was about to lose his temper.

"Isn't the date also a gift for Nana?!" the girl shouted confidently.

"What kind of gift is that?!"

"It's just a gift. Nana is clearly trying to save Cheng Fei money. He doesn't need to buy anything; he just needs to go on a date with Nana. But Cheng Fei won't even agree to that. Poor cat!"

"Pity you my foot!"

"I didn't do anything wrong, but I still got scolded?! I'm really going to cry!" She sobbed, and tears started welling up in her eyes.

"Stop crying! Don't you dare cry!" the boy glared at him.

"Not even allowed to cry? That's bullying a cat!" The girl's voice began to tremble.

"Nagasaki Asuna, you'd better stop now!"

During this strange conversation, the serpentine silver sports car disappeared down the road.

……

In a quiet, upscale restaurant, a tall, handsome young man and a sweet, elegant young woman sat facing each other by the window, their vibrant youthful energy drawing the attention of every diner.

Asuna Nagasaki sat obediently with her legs together, obsessively cutting a quarter of the small crab cake on her plate, putting it in a spoon, and pursing it with her lips slightly parted. "Cheng Fei, classmate."

"Huh?" The boy opposite him forked a whole lobster claw meat, looked at it, dipped it haphazardly in the green sauce at the bottom, and ate it. He tasted something like fennel and remembered the tarragon that the chef had introduced to him when he had dinner with Lin Xuanqi.

"Did Cheng Fei really have a problem revealing Xiao Yi's secret during the last roadshow? I've been wanting to ask him that."

"Roadshow? What we talked about back then was all made up. Anyway, not many investors really understood algorithms. Having the Lin family's endorsement was enough." The boy shook his head.

"Oh, I see?" Nagasaki Asuna chuckled. "Cheng Fei is really something."

"Is this place good?" The boy pinched her cheek.

“Any restaurant tastes good when I’m with Cheng Fei,” the girl said without hesitation.

"Then I'll take you to a street food stall next time." The boy shook his head and continued to devour another piece of lobster claw meat on his plate.

"Okay~" the girl replied sweetly with a happy feeling, as if she had been promised something good.

When the next dish of xiaolongbao was served, Nagasaki Asuna took a small sip of the crab roe soup inside and said, "Cheng Fei."

"what?"

"Where did you send the items for authentication yesterday?"

"I went to the Academy of Science and Technology and got a senior student majoring in biology to help me out." The boy started eating his steak.

"Can students really do this kind of assessment?" The girl asked curiously, taking a small bite of her steamed bun.

"Actually, there's not much technical difficulty. You extract DNA, amplify it with PCR, run electrophoresis, and then analyze the data. His lab has all the necessary tools, so there shouldn't be any problems if nothing unexpected happens." The boy recalled for a moment and continued to finish his steak.

"So, Cheng Fei even knows this? That's amazing." The girl stared at him, her eyes unblinking.

"It was just some pre-existing tutoring," the young man said dismissively, shaking his head.

"Cheng Fei, ah~" Nagasaki Asuna suddenly held a half-eaten soup dumpling soaked in soup to his mouth.

The boy looked at it, then took a bite and ate it.

"Is it delicious?" The girl smiled happily.

"It's delicious." The boy nodded.

"Which tastes better, honey or milk?" The girl's eyes darted around, a sly smile playing on her lips.

“Of course it’s honey milk.” The boy glanced at her glistening pink lips.

"How about we give Cheng Fei some more of Nana's honey milk when we get back?" The girl rested her chin on her hands, looking innocent and naive.

"A vixen." The boy sighed, recalling the rich, smooth texture of the past.

As the two sat in the restaurant chatting casually and enjoying their rare holiday date, Cheng Fei's phone, which was placed next to him, vibrated.

The boy picked up the phone, glanced at it, and answered, "...Okay, I'll be there as soon as possible. Thank you for your hard work, senior."

After he hung up the phone, Nagasaki Asuna put down her cutlery and tilted her head. "What's wrong?"

"There's been a bit of a problem with that senior, I need to go over there." Cheng Fei sped up his eating of the steak.

"Eh, so I can't go on a date with the cat?" The girl blinked, her face visibly losing its sparkle.

"What are you thinking about? I'll take you with me. Eat quickly." The boy vigorously rubbed her head.

"Okay~" The girl snapped back to reality in a second and happily lowered her head to eat.

After filling their stomachs, the two headed to the Academy of Science and Technology as quickly as possible, arriving at the School of Life Sciences building where Cheng Fei had been the day before.

A slightly overweight young man was waiting here.

"Senior Gu, what's going on?" Cheng Fei came up to him, with Nagasaki Asuna following closely behind with her hands behind her back.

"Let me tell you something," Gu Fan said hesitantly, then beckoned.

The three of them went to the break room, and Gu Fan pulled two chairs next to his workstation. The three of them sat down.

Gu Fan glanced at the data displayed on the laptop, hesitated for a moment, and said, "President Cheng, let me be frank, that tooth... did you take the wrong one?"

"You took the wrong one? No way." Cheng Fei stared at him. "What's wrong? Aren't you related?"

“It’s not a matter of whether or not there is a kinship.” Gu Fan pondered for a moment, “That tooth doesn’t seem to be human at all.”

"What do you mean by not being human?" The boy's eyes narrowed, his doubt genuine. "Doesn't look human?"

"It's not that the appearance is different, it's that the DNA inside is different," Gu Fan gestured.

"That's impossible. How did you come to that conclusion?" The boy asked calmly, guiding him to continue.

Gu Fan thought for a moment, "If you want to know, I'll explain the principles behind our identification process to you first."

"No need to explain, I roughly know," Cheng Fei interrupted him.

"Alright, then I'll get straight to the point." Gu Fan glanced at the boy, a hint of surprise in his eyes, but continued, "Something was off when we were extracting the DNA yesterday. The sample absorbance was abnormal. I initially thought it was contamination from impurities and didn't pay much attention to it. It shouldn't affect the subsequent steps too much."

He paused, then continued, "When the electrophoresis results came out this morning, the peaks on the spectrum were completely wrong. The twenty marked sites only had a few weak peaks, while the background area had many strange peaks. Do you understand what this means?"

Cheng Fei thought for a moment, "You used a human identification kit?"

"Of course," Gu Fan nodded.

The boy pondered for a moment and said, "That means the primers targeting human DNA didn't bind to the intended gene fragment, but instead bound to something else."

"That's roughly the idea." Gu Fan clenched his fist. "If the DNA in the tooth has degraded, all the peaks should weaken evenly. Or if the reagent is contaminated, then there will be no results. As it is now, the primer and template DNA are incompatible. Either there is a special genetic disease, or they are not the same species. So you'd better check if you picked up the wrong tooth."

After he finished speaking, he shut his mouth and waited for the boy to make a decision.

He had done similar experiments before, so when he received this job from Ruan Guodong, he never thought there would be any problems.

What he's worried about now is that the identification might fail. The tooth is very precious, and it wouldn't be good if the young man in front of him, who seems to have an extraordinary background, thought the problem was with him.

After a brief silence, Cheng Fei took a deep breath. "I understand. Just send me a copy of the data."

“No problem, then what?” Gu Fan stared at him.

"And then nothing happened." The boy's nonchalant attitude was as if he had accidentally given the wrong flavor of a scallion pancake to the snack shop owner.

Gu Fan was stunned. The other party's reaction was completely different from what he had expected. "Then what about your identification? Are you not going to do it?"

"Okay, that's fine, I won't do it anymore." Cheng Fei said, standing up, extending his hand to him with a smile, "If there's nothing else, let's leave it at that. Thank you for your hard work this time, senior. If there's anything I can help you with in the future, feel free to contact me."

The slightly chubby young man grasped his hand blankly, "Alright, as long as you're satisfied..."

Soon, Gu Fan handed the data to Cheng Fei and then saw the boy downstairs.

Standing there watching the two leave, Gu Fan thought for a moment and couldn't help but say, "President Cheng, did you already know this would happen?"

The boy turned around with his hands in his pockets and looked at him, his amused expression genuine. "How could that be? Senior, don't overthink it."

……

Cheng Fei and Nagasaki Asuna returned to the car.

The boy first checked the data he had received, then looked out the window and fell into deep thought.

The body in Lin Wanqing's tomb was neither Lin Wanqing nor anyone else; it was not human at all. This result was quite unexpected.

Nagasaki Asuna noticed the boy's slightly furrowed brows, then her eyes flickered, and she said calmly, "Cheng Fei, why don't we go back and find Shen Xi now?"

"Let's talk about it tomorrow. I'll take you on a date first." The boy looked at her and gently stroked her cheek with a doting expression.

The girl looked at the boy's expression, seemed to sense something, covered his hand and shook her head seriously, revealing a soft smile, "Cheng Fei, talk to her first before dealing with Nana."

The boy looked at her helplessly and ruffled her hair. "I'll deal with you after this is over."

"Okay~ We'll clean it up even more thoroughly than yesterday, until the cat can't even walk anymore, okay?" The girl cheered.

"It's hopeless."

Palamera left the Academy of Science and Technology and sped towards Guang'an Street.

Back on the 36th floor of the upscale apartment building, the two opened the familiar door.

As Cheng Fei walked in, the aloof girl with long, dark hair, dressed in a short-sleeved shirt and shorts loungewear, was carrying a bundle of clothes as she headed towards the bathroom. Her gaze fell upon him, then swept over Nagasaki Asuna behind him, and she continued on her planned route without a trace of expression, as if she hadn't seen anything.

Cheng Fei stood at the door with his hands in his pockets, watching her throw all the clothes into the washing machine drum and start the machine running again.

"Little cutie, don't you recognize me again?" The boy stood in front of the girl, leaning down to examine her cold yet beautiful face.

"He's just a rat who runs around with a shameless vixen. So what if we know him?" Shen Xi was forced to stop, her eyes narrowed as she stared at the air in front of the boy's chest, making no attempt to hide her disgust.

Asuna Nagasaki stood to the side with her hands behind her back and blinked.

"That's too cold-hearted." Cheng Fei shook his head and sighed, then paused, "Actually, the test results are in, but due to special circumstances, I'm telling you as soon as possible."

"What was the result?" The aloof girl suddenly looked up.

So the three of them sat down, and Cheng Fei briefly explained the situation to her.

"Not human... How is that possible?" Shen Xi's pupils contracted.

"Judging from the results, that's the case, unless I happen to find a tooth from another animal in the tomb." The boy looked at the electrophoresis chart in his hand.

"Um, could it be that Cheng Fei actually got dentures?" Nagasaki Asuna tilted her head.

The boy opened his mouth, "Nana, if it's a denture, there won't be any results at the DNA extraction step."

"Are you sure you've extracted DNA?" Shen Xi looked at the data she received from Cheng Fei, her face full of confusion as she lacked relevant knowledge.

772. The Secret of Nagasaki Asuna's Mastery of Invisibility

"Well... it's really hard to say." The boy hesitated for a moment, then decided to use a more precise expression. "The light absorption is also not quite normal. It might be due to impurities, but we can't rule out other possibilities."

"But didn't the electrophoresis later produce results?" Nagasaki Asuna said.

"That's right. So it could be another animal that, due to the lack of the corresponding gene fragment, caused the primers prepared for human genes to become ineffective. It could also be an organic substance similar to DNA that just happens to bind to the primers, resulting in strange behavior in the background area of ​​the map." Cheng Fei pointed to the fluctuating part of the data.

Shen Xi remained silent.

The boy looked at her calmly and said, "Teacher Shen, so I'd like to ask a question that might be considered inappropriate."

"What?" Shen Xi asked suspiciously.

"Is your mother really human? And are you human?" The boy looked her over seriously, as if he were getting to know the girl in front of him all over again.

“I’ve already told you I’m definitely human, and I’ve never had any problems at the hospital.” The girl kicked him without any politeness.

“That makes sense. You had genetic testing done when you were hospitalized as a child.” Cheng Fei recalled the medical records he had seen.

"So, Shen Xi's mother isn't human, she's an alien?" Nagasaki Asuna looked at the two of them.

Shen Xi frowned in thought, her face turning displeased.

Cheng Fei thought for a moment, "Nana, considering that it's more likely she faked her death, the grave probably contains other things, so it's hard to say what her identity is."

"Huh? It feels a little cool..." Nagasaki Asuna touched her arm.

"Didn't you confirm it that night?" Shen Xi stared at Cheng Fei.

"At least at the time, nothing seemed amiss." The boy recalled what he saw when the museum opened, and shrugged.

Shen Xi fell silent again.