Not knowing is not a crime. The form of responsibility for the crime of harboring, transferring, purchasing and selling stolen goods is intentional. Intention here refers to the subjective psychological state of harboring, transferring, buying or selling stolen goods on behalf of criminals. Knowing here means knowing or should know. Knowing that it is a crime of concealing and selling stolen goods, we should not only analyze it according to the defendant's confession, but also according to the objective facts of the case. As long as it is proved that the defendant knew or should have known that the stolen goods obtained from the crime were hidden for him or sold on his behalf, it can be determined.