2. The people in the paper are the first person and the third person.
3. Paper clue: 1 Take time transfer as the clue 2 Take a person as the clue 3 Take one thing as the clue 4 Take one thing as the clue.
4. The order of papers: chronological order, flashback and insertion.
5. The paper is divided into events and development process, spatial transformation, content change, people, scene change, emotional change and expression change.