Sandwich narrative: that is, divide the narrative into two lines; Or narrative theory and discussion theory.
Grey line method of grass snake: just like foreshadowing, mention a person or a thing in front, but don't say it when you press it, and talk about it later.
Back powder method: similar to foil, you have to write one thing and foil it through another.
Stealing time from work: at the climax of the story and when the situation is tense, you deliberately write something beside it.
Borrowing a tree to blossom is to borrow a story from other novels as the introduction of your own novel.
Double spelling: this is not clear ...
Crossing the clouds and breaking the mountains: I don't know this either. . .
Chunqiu brushwork: similar to Chunqiu, deliberately blurring the story. . . .