Second, inventions made in China must first be patented in China.
(Article 20 of China's Patent Law stipulates that any unit or individual who applies for a patent for invention or utility model completed in China to a foreign country shall file a confidentiality review with the patent administration department in the State Council in advance. The procedures and time limit for confidentiality review shall be implemented in accordance with the provisions of the State Council.
Units or individuals in China may file an international patent application in accordance with the relevant international treaties to which People's Republic of China (PRC) is a party. The applicant who files an international application for a patent shall abide by the provisions of the preceding paragraph.
The patent administration department of the State Council shall handle international patent applications in accordance with the relevant international treaties to which People's Republic of China (PRC) is a party, this Law and the relevant provisions of the State Council.
Where an invention or utility model that violates the provisions of the first paragraph of this Article is applied for a patent in a foreign country, the patent right shall not be granted in China. )
Thirdly, after filing a patent application in China, you can file a foreign application through the Paris Convention mode and the PCT mode (in the latter case, you can also file a PCT application directly with China National Intellectual Property Administration).
The specific process is very complicated, so it is difficult for individuals to contact foreign firms to represent foreign patent applications, and it is best to entrust them to handle them.