https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/china/filing-grant/can-i-withdraw-my

Can I withdraw my application before it is published in China?

Yes, you can withdraw your application at any time before grant. Where the request for withdrawal is submitted after the preparations for publication have been completed, the document will be published as scheduled, and the withdrawal will be published in the next issue of the patent gazette.

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