What do you mean by "three trials and three schools"

This word is the basic system in the process of publication editing.

The "three-review system" means that in the editing process of publications, there will be three-level review processes: the responsible editor is responsible for the preliminary review, the editor-in-chief carries out the review, and the editor-in-chief carries out the final review. The purpose of the system is to ensure the accuracy and quality of the published content.

"Three proofreading system" means that after the manuscript is edited, full-time proofreaders need to proofread it at least three times to find and correct possible errors or omissions.