(1) novelty. Novelty means that the invention or utility model does not belong to the existing technology, and before the filing date, no unit or individual has filed an application for the same invention or utility model with the patent administration department of the State Council, and it is recorded in the patent application documents published or announced after the filing date. However, within six months before the date of filing, the invention-creation applying for a patent will not lose its novelty in any of the following circumstances: ① it was exhibited for the first time at an international exhibition sponsored or recognized by the China government; (2) It was first published at a designated academic conference or technical conference; (three) without the consent of the applicant, others disclose its contents. (2) creativity. Creativity means that the invention or utility model has outstanding substantive characteristics and remarkable progress compared with the existing technology. The so-called existing technology refers to the technology known to the public at home and abroad before the filing date. (3) practicality. Practicality means that the invention or utility model can be manufactured or used and can produce positive effects. The invention or utility model for which the exclusive right is obtained must be suitable for the production field, not purely theoretical. It should be noted that practicality does not require that the invention or utility model has produced positive effects, but only the possibility of producing positive effects in the future.