It turns out, Xu Yan had two younger sisters, they were born on the same day, they are a pair of twins.
On the day they were born, a fortune teller came to the door, saying he was fated to meet the two children and gave them a divination.
After the divination, the fortune teller told the Xu family that the two children were born to counteract each other and only one could be kept.
The Xu family parents naturally refused.
So, they begged the fortune teller to provide a solution, and finally, the fortune teller provided a method, which was to let the two children share one identity, having only one name.
Once the two children had their own identities, only one could stay in the Xu family, the other would have to be raised elsewhere, or simply abandoned.
Henceforth, the two children shared this one identity of Xu Nuo.
