The disclosure discloses a registration method or an unregistration method for a home information machine and a home information machine thereof, to solve the problem of low security and reliability in the prior art when a Portable Part machine is registered on the home information machine. A protective layer comprising an SiCN film is formed on the dielectric film. Jaw movement towards one another effects a stretching function. When an error is detected, the receiving node immediately sends out a negative acknowledgement, prior to the normal interframe spacing provided in network protocols, so that the transmitting node becomes aware that the data packet was not properly received at the receiving node. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.