In China, once a patent for invention or utility model has been granted, apart from the patent invalidation proceeding, the patentee does not have other opportunities to amend any claim of the patent on his own initiative.  After the request for invalidation of the patent is filed, within one month after the patentee receives the request for invalidation and the evidence, the patentee is allowed to amend the claims of the patent at issue in response to the request for invalidation.  However, manners of amendment allowed are strictly limited.
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