If ancient history is not reliable, then surely the fact that masses of Chinese came to Mexico in the late 19th century to build the railways, and fathered generation after generation of children with local women is "admissible evidence" of links between us?
如果遠古歷史不可考，那麼十九世紀末成群的中國人到墨西哥興築鐵路，與當地女子繁衍了一代又一代，總是「於法有據」的事實吧？