In response to your request, my opinion is: the issue you are talking about is a priority issue, which includes international priority and domestic priority. International priority refers to the period within 12 months from the date when the applicant first files a patent application for an invention or utility model in a foreign country, or within 6 months from the date when the applicant first files a patent application for a design in a foreign country. The priority enjoyed by China when filing a patent application on the same subject matter.
Since you read the bar exam book, you should be very clear now.