https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/china/filing-grant/foreign-applicant

As a foreign applicant, do I need to appoint a professional representative in China?

Yes. If a foreign applicant, enterprise or organisation does not have a residential or business address in China, they must appoint a legally established patent agent to represent them in the patent prosecution procedure in China.

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