Do I have to pay for the copy of domestic priority?

Pay. According to the inquiry of official website, China National Intellectual Property Administration, when submitting the copy of domestic priority, you need to pay the registration fee of 30 yuan and the copy fee of 30 yuan, and you need to pay. Priority means that the patent applicant first filed a patent application in a certain country for his invention and creation, and then filed a patent application with the same theme in China within the statutory time limit.