Fate, this is how it is explained in the dictionary.
Opportunity. There is an inevitable chance and possibility of encounter.
Xia Li always thought that this kind of thing was a lie. It wasn't until he met Nan Xia that he realized that this kind of thing was indeed a lie.
It's like, when someone asked him if his mother's surname was Xia, he would say that Xia Li is my sister. One of us has our father's surname, and the other our mother's surname.
It seems like nothing is wrong. But only Xia Li knew that he did not recognize her mother. His name is not Nan Xia either.