Is the transferor still the subject of patent right after the transfer of patent right?

Yes According to the relevant provisions of the inquiry, patent licensing only means that the licensor (that is, the patentee) allows the licensee to use his own patent within a certain period and scope. Patent transfer means that the patentee, as the transferor, transfers the ownership or holding right of his invention-creation patent to the transferee, and the party who obtains the patent through the patent transfer contract becomes the new legal patentee.