Professor Song Zhenglin had already explained the requirements for Lu Mingxiang to teach the Butterfly Flight Technique. She would not teach students who are not in the School of Radiation Influence.
So Xu Tui did not contact Lu Mingxiang again. He could not force her.
Instead, he turned to study and think. If Lu Mingxiang was able to figure it out, Xu Tui felt that he should be able to do it too.
Professor Song Zhenglin had even explained the basic principles of the Butterfly Flight to Xu Tui. Of course, Xu Tui had to remember this favor. He had to return the favor when he had the chance.
Xu Tui was also very smart. Since he knew the principle of Butterfly Flight, it would not be difficult for him to come up with a way to implement it.
There should be another prerequisite ability—mental perception. It had to be a large-scale mental perception. Otherwise, if the range of the rapid teleportation was too small, Butterfly Flight would be meaningless.