There were 22 main cards and 56 side cards in one set of Tarot. The pirated version Qianmo bought from the street stand had only 22 main cards, which was, however, not a hinder for her to do any bluffing.
She was a psychology disciple who had been interested in Tarot, fiddling with the cards since she was a teenager. But she had not been serious with the card or the fortune-telling back then.
After she went to jail, she received instructions from a grandmaster and made rapid progress in this aspect professionally, thus being better at Tarot. Psychology and fortune-telling were basically connected, and microexpression, which was what Qianmo focused upon, fitted perfectly in the whole puzzle.
Some of her cellmates were also fortune-tellers, sharing the same profession as Mu Feifei and exceeding her in every way.