The card master who made cards needed to act at the same time as the maintenance person. In general, very few ordinary cards could be taken in for repair, since it was very easy to reduce that card's performance while it. The costs were also very high. But if it was a rare and valuable card, it was quite possible that one might be able to afford one without there being any market for it; there would be no place to go if one wanted to buy it. If it were damaged, one would have to take it in for repair.
Chen Mu's perception was very low. That card master that one year had never taught him how to train his perception. Although specialized training materials were well defined, and Chen Mu had started training early-on according to the prescribed methods, his results up to then had been quite meager.
