The questioner's guess was simple—the Immortal Teacher might be a real "Immortal."
Of course, this guess was mocked by the netizens who were eating melons, yet many agreed.
[To be honest, I really think that Immortal Teacher isn't quite normal. If she really is an individual rather than a team, then 'genius' wouldn't suffice to describe her. I've checked her age; she's eighteen. Even if she'd started from the age of zero and worked twenty-four hours a day without eating, drinking, or sleeping, she still wouldn't have had enough time to master so many specialities.]
[I strongly suspect she has stolen Emperor Qin Shihuang's elixir of life and lived for over two thousand years, which is why she knows everything.]
[...]
There were also suspicions that Bai Chuwei was transformed from a Fairy.
In tens of thousands of comments, one anonymous reply read, "She's a two-thousand-year-old turtle demon."