https://www.epo.org/en/node/can-i-submit-0

Can I submit a request for a time limit extension with the Chinese Patent Office?

Yes, you can request extensions of time limits specified by examiners at the Chinese Patent Office if you are unable to perform a certain act or procedure within the time limit concerned. You must explain the reasons why you are asking for an extension and pay a fee. However, there are certain time limits which may not be extended.

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