If no one raises any objection, the certificate can be received within three months.
The legal basis is, "Patent Law" -
Article 41 Within three months from the date of announcement of a patent application, anyone may apply for a patent in accordance with this law The Bureau objected to the application. The Patent Office shall send a copy of the objection to the applicant, and the applicant shall submit a written reply within three months from the date of receipt of the copy of the objection; if the applicant fails to submit a written reply within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn.
Article 42: If the Patent Office considers that the objection is established after review, it shall make a decision to reject the application and notify the opponent and the applicant.
Article 43 The Patent Office shall establish a Patent Reexamination Committee. If the applicant is dissatisfied with the Patent Office's decision to reject the application, he may request a reexamination to the Patent Reexamination Board within three months from the date of receipt of the notice. After review, the Patent Reexamination Board will make a decision and notify the applicant.
If an applicant for an invention patent is dissatisfied with the Patent Reexamination Board’s decision to reject the reexamination request, he may file a lawsuit with the People’s Court within three months from the date of receipt of the notice.
The decision of the Patent Reexamination Board on the applicant’s request for reexamination of utility models and designs is final.
Article 44 If there is no objection to the patent application or the objection is not established after examination, the Patent Office shall make a decision to grant the patent right, issue a patent certificate, and register and announce relevant matters.