https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/china/filing-grant/can-i-claim
Can I claim priority for an application filed in China?
Yes. The priority term is 12 months from the earliest claimed priority. Multiple priorities are possible. Domestic priorities can be claimed within 12 months from the date of first filing in China. If a later application claiming domestic priority is filed, the earlier application is deemed to have been withdrawn.
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