Generally speaking, you only know that it is not illegal, but the learning process may need to go through many customs, attend many courses, and carry out a lot of training and certification, so it costs more. A training system cannot be defined as illegal because of its high fees.

Only knowledge is Sanskrit, transliteration of Pilodimo Tanlado. Sanskrit is called knowledge only in reverse, and Chinese is translated into knowledge only. The only-knowing Sect believes that all phenomena outside my mind are realized by my mind itself, that is, by the seeds in the eighth Ayye knowledge, so all phenomena are not true except my mind. So: knowledge is boundless; Or on the one hand, since the phenomena of all things are changed by knowledge, it is called knowledge-only change.