1. China's Trademark Law stipulates' foreign priority', that is, if a patent applicant files a patent application in China within 12 months from the date of filing a patent application for the same invention or utility model for the first time in a foreign country, or files a patent application in China within 6 months from the date of filing a patent application for the same design for the first time in a foreign country, the date of filing a patent application for the first time in a foreign country shall be the priority date. According to international conventions, this principle also applies to claiming priority when applying for patents in foreign countries.
If your patent application meets the above time limit, you can claim priority abroad.
2. According to the relevant provisions of international conventions, invention patents are generally publicized, and the specific procedures should refer to the patent law of the applicant country.