If it is necessary to publish in advance, it is necessary to submit the Declaration on the Advance Publication of Invention Patent Requests (1 1030 1) to China National Intellectual Property Administration (the form can be obtained from "Service Area, Form Download" on the website of China National Intellectual Property Administration).
Publication is a necessary procedure before substantive examination. The later the publication, the later the entry into the actual examination, and of course the later the authorization.