When Xia Xiang took the photo upstairs, her father was looking at the poisoned letter and discovered a cursed phrase he couldn't understand hidden in the letter's lining.

"What does this mean?" Ye Siren was so engrossed in his thoughts that he didn't even notice Xia Xiang had gone inside.

"Go back," Xia Xiang said, frowning.

She was quite good at learning the magic language. She initially thought it was just her strong learning ability, but later learned that she might also have some genetic factors involved. Although the spell was alive, that didn't prevent her from understanding its meaning.

"What?!" Ye Siren asked, puzzled. "Return to what?"

"Ah! Xiaoying, you scared me to death!" When Ye Siren looked closer, the demonic words had already disappeared into the paper.

"Sorry, Dad, I saw the door wasn't closed," Xia Xiang said apologetically.

"You said this demonic language means 'return'? Return to what?" Ye Siren asked.

"Yeah, I don't know what to say." Xia Xiang didn't want to play riddles here; she just wanted to figure out which of the two ugly dolls in the photo was which.

"Dad, look, do you recognize these two people?"

“Isn’t that me?” Ye Siren said, looking at the photo. “Your dad was quite a cute little boy when he was young, otherwise he wouldn’t have grown up to be so handsome, right?”

"When Xiaoying was little, she was fair-skinned and delicate, and her eyebrows and eyes looked especially like her father's. However, she mostly looked like your grandfather when he was little."

"Uh, what about the one next to this cute little kid? They look exactly alike. Does Dad have a twin brother?" Xia Xiang asked.

"Oh right, who is this?" Ye Siren frowned again. "I don't think I have any brothers. I've been alone since I was little, and then there's Sisi from my second uncle's family. I don't have any other brothers."

"Where did this photo come from?"

"My eldest brother found it in a secret compartment in Grandpa's study," Xia Xiang said.

"Dad really doesn't remember much," Ye Siren said with a bitter face. "How about we ask the older elders when Dad has time?"

"Okay, I'll be going now. Please tell Mom when she gets back." Xia Xiang planned to go to the ancient tomb hospital to ask about the identification results.

"Be careful, or your mom will worry again," Ye Siren instructed.

Xia Xiang agreed and went out.

——

"What is this?" Xia Xiang asked, holding the report. "The conclusion is that we belong to the same human species? Is there such a hastily written report?!"

"Xiangxiang, you're making things too difficult for me. Humans and chimpanzees have 99.25% DNA similarity, and you want to test a hair sample to see if we're brothers? What's the point?" Guo'er said irritably.

"Using blood to test for the Y chromosome?" Xia Xiang asked.

"I can give it a try," Guo'er rolled her eyes and nodded, silently reminding herself, "She's a customer, she's a customer!"

"Actually, I have a question. What's the DNA similarity between clones from different timelines?" Xia Xiang asked.

"One is science, the other is theology, what do you think?" Guo'er felt like Xia Xiang was driving him crazy. If she weren't the biggest member of the Ancient Tomb Hospital, he would definitely kick her out.

"Is there any way to detect whether this person and another person are from the same time and space?" Xia Xiang pressed on, raising another idea.

Guo'er had a flash of inspiration, "I'm quite good at doing things that don't follow science, and your idea is correct."

"Okay?" Xia Xiang was also pleasantly surprised. "Then hurry up, I need the results."

"This test is very expensive~" Guo'er said, raising an eyebrow at Xia Xiang.

"I'll top up my card," Xia Xiang said without the slightest hesitation. "You sit down first, I'll go down and top up my card right away."