This answer made Sage Fang feel a trace of doubt. Clearly, before the Great Destruction, humans didn't have real records of alien visitors. The so-called fifth kind of contact before the twenty-first century was ultimately proven to be lies.
So, where exactly did that segment of the paternal bloodline gene come from?
Now, the Academy of Sciences is comparing the genetic sequences among Thainan's families to see if relevant fragments can be captured. Although to Sage Fang, the Great Destruction eliminated too much, the likelihood of finding comparative fragments is extremely low, and without extremely high similarity, none of this can be proven.
As for why Malin's paternal bloodline can be confirmed to contain human genes... it's straightforward. This alien visitor's paternal genes stubbornly marked them, with the origin of each gene segment noted, even the connecting years are marked.