After listening to Han Qing's story about what happened to the Han family that year, Su Nian and the others looked at each other, not knowing what to say. This was really too unlucky!

"So, I'm the only one at home now!" Han Qing sighed, looking like a cynical young master again.

Tang Xin rubbed her face in shock. She looked at Su Nian, then at Han Qing, and stammered, "If you suspect Su Nian is your sister, why don't you do a paternity test?"

Han Qing scoffed, "My parents are both missing, who's going to do a paternity test? My grandfather, my sister, and I are all relatives, and we're all male relatives, so this can't be checked!"

It turns out that quite a few people have come to the Han family to claim kinship over the years, causing Han Qing to become an expert in this area.

Parents and children can undergo paternity testing to determine whether they are related by blood by comparing the similarity of their DNA.

If the parents are no longer around and only the grandparents and grandchildren are left, the test done is called kinship testing, and with the level of technology at the time, it was impossible to prove kinship.

If the grandfather and grandson need to be identified, these two male relatives both have Y chromosomes, and this chromosome can be compared at this time. Unfortunately, Su Nian is a girl and does not have a Y chromosome. By comparing her with Grandpa Han, it is impossible to determine whether the two are related by blood.

Because the comparison of genetic similarity itself requires that more than three points are exactly the same, it can be considered that the two appraisers are related.

It was impossible for a grandparent and grandchild, who inherited the genes from different generations, to find three similarities given the technology at that time.

By the same token, the paternity test between Han Qing and Su Nian has no clinical significance.

Su Nian was also very clear about these things. She had studied this matter carefully in order to do a paternity test with Su's father and mother.

By the time I had explained all this to Tang Xin, it was almost nine o'clock.

Chu Beichen looked at the sky and said to Han Qing, "Anyway, we still gained something today. I'll take Su Nian home now. As for Tang Xin, I'll trouble you to take her back to school!"

Han Qing was of course more than happy to accept such an arrangement, but he wouldn't miss any opportunity to tease Tang Xin. So after listening to Chu Beichen's suggestion, Han Qing looked down at Tang Xin and said, "Little Tang Xin, I've done a lot for you today. Not only did I call you here at your service, I even sent you back to school!"

Tang Xin blushed. She was still very angry about what Uncle Han did to her at school last time. But looking at the situation today, she probably couldn't refuse Uncle Han to take her home.

Just as she was about to nod, a staff member walked in, holding two boxes. "This is a gift from the leader for the two young ladies. Minister Han, please pass it on!"

Han Qing took it and opened the box to show everyone. Inside were two identical white jade peace buckles, the jade was delicate and lustrous. "This is something my grandfather got in his early years. There were no girls in the family, and he always complained that these two jade buckles were wasted. Now it's just right to give them to you!"

Han Qing closed the lid and handed them to Su Nian and Tang Xin respectively. He knew his grandfather's intentions very well. It was reasonable to give one to Su Nian. As for Tang Xin, this was the first girl he brought home. He probably regarded her as his future granddaughter-in-law.

Su Nian and Tang Xin declined for a while, but seeing that Han Qing insisted, they accepted the gift.

"Su Nian, don't worry. I'll take care of tracking down the cufflinks. I'll look for a suitable person tomorrow!" Han Qing promised, patting his chest.