1) when making a request for substantive examination,
2) Within 3 months after receiving the notice to enter the substantive examination stage.
In your case, you can wait for the "Notice of Entry into Substantive Examination" issued by the Patent Office, and submit the active revision of the application documents within 3 months after receiving the notice.
Refer to Article 5 1 of the Detailed Rules for the Implementation of the Patent Law: An applicant for a patent for invention may voluntarily put forward amendments to the application for a patent for invention within three months after submitting a request for substantive examination and receiving a notice from the patent administrative department of the State Council that the application for a patent for invention has entered the substantive examination stage.
An applicant for a patent for utility model or design may, within 2 months from the date of application, put forward amendments to the application for a patent for utility model or design.