Is it right or wrong that the transferor remains the subject of the patent right after the patent right is transferred?

Mistake. After the transfer of the patent right, the transferor is no longer the subject of the patent right, and the original transferor cannot use it after the transfer of the patent right, but the original patentee can continue to use it if he signs a valid license contract with the current patentee after the transfer of the patent right. Patent transfer means that the patentee transfers his ownership to others within the effective time and area, which is a kind of technology transfer.