If it has not been submitted to the National Intellectual Property Bureau, it can be modified.
Article 51 of the Implementing Rules of the Patent Law stipulates:
An invention patent applicant shall enter the substantive examination stage when submitting a request for substantive examination and upon receiving an invention patent application issued by the Patent Administration Department of the State Council. Within 3 months from the date of the notification, you can actively propose amendments to the invention patent application.
Applicants for utility model or design patents may proactively propose modifications to their utility model or design patent applications within 2 months from the filing date.
If the applicant makes modifications to the patent application documents after receiving the notice of examination opinions issued by the Patent Administration Department of the State Council, the applicant shall make modifications to address the defects pointed out in the notice.