[The Mind Concentration Foundation Forging Technique Version 4.9, Volume 1]
That was the description of the projection card that An Xiaoxue had given Xu Tui.
The projection card was a so-called memory card from a long time ago. It was a new form of the SSD hard disk. It was made out of a special material. As long as it was attached to a communication device, it could be read and projected at any time.
Of course, some projection cards had a password, rights, and other special requirements.
The projection card that An Xiaoxue had given Xu Tui needed a password. However, the password was extremely simple—0000.
This made Xu Tui a little suspicious about how precious the secret training method of the School of Enlightened Mind was. Of course, it might be because An Xiaoxue's teacher was not afraid that someone would steal his technique.
Just as An Xiaoxue had said, people could not learn it secretly without the ability of introspection.