Second, for an application for a patent for invention, the Patent Office will issue a notice of examination opinions at least once and ask for a reply within the prescribed time limit.
Third, if the Patent Office considers that your patent application meets the authorization conditions and the substantive examination stage is over, the Patent Office will send a document to inform you to register for authorization. Judging from the legal status, your patent application is probably still in the process of substantive examination.
Legal basis: Article 35 of the Patent Law of People's Republic of China (PRC). Within three years from the date of filing, the administrative department for patent in the State Council may at any time conduct substantive examination of the application. If the applicant fails to request substantive examination within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn. The patent administrative department of the State Council may, when it deems it necessary, examine the application for a patent for invention on its own.