What are the conditions for the priority of patent application

The requirement of patent application priority is: 1. Inventions and utility models applying for patent priority should be novel, creative and practical; 2. The design should not belong to the existing design. Article 30 of the Patent Law stipulates that an applicant who claims the priority of a patent for invention or utility model shall make a written statement at the time of application and submit a copy of the first patent application document within 16 months from the date of the first application. Where an applicant claims the priority of a design patent, he shall make a written statement at the time of application and submit a copy of the first patent application document within three months. Where the applicant fails to submit a written statement or a copy of the patent application documents within the time limit, it shall be deemed that the priority has not been claimed. Article 30 of the Patent Law Where an applicant claims the priority of a patent for invention or utility model, he shall make a written statement at the time of application and submit a copy of the first patent application document within 16 months from the date of filing the first application. Where an applicant claims the priority of a design patent, he shall make a written statement at the time of application and submit a copy of the first patent application document within three months. Where the applicant fails to submit a written statement or a copy of the patent application documents within the time limit, it shall be deemed that the priority has not been claimed.