passive rfid

The company explained to us about the passive RFID, after listening to my very confused, because I do not know the passive RFID now the lecturer speaks what Dongdong, no contact before me, and I have asked our many colleagues, they all said they were not aware of the passive RFID it is what to do, so I have to seriously listen to the teacher, when he finished, I still don’t understand so I went to ask the lecturer, he told me, I knew our intention, really good Oh, I am very happy also, because I also want to have this result, we can also use the passive RFID.