How long does it take for the invention patent to pass the preliminary examination and be publicized online? (Applicant requires "early disclosure")

First of all, we must distinguish that you are talking about propaganda, not propaganda! The contents of the invention application documents will be made public about one month from the date of receiving the notice of substantive examination of the invention patent requirements. As for the specific time, no one can say for sure, it depends on the progress of the exam at that time.