What are the traditional common writing techniques? What is the specific content? What are their respective roles?

Focusing, that is, describing the details in depth and detail, is a writing technique to establish the focus of the article. Setting bones is a writing skill to build the skeleton of an article. Suspense refers to the author's careful setting of contradictions and doubts to activate readers' interest in reading. The secret love, coincidence and accident carefully set by the author in the article are the driving force for the development of the plot. There are also misunderstandings that drive the story full of contradictions, ups and downs, and complexity. Make the story structure more complete. It may not be an accurate answer, but I hope it will be useful to you.