Place it at the cut where a page or document first appears, before any narration or on-screen text begins. Follow it with a bell ding once the new heading is visible, and use a camera shutter when the page shows a photo worth keeping.
关于此声音
This is a short, crisp foley clip of a book being flipped open, with pages shuffling and settling in just over a second. There is no voice or music behind it, so the paper stays clear and light. It feels quick and tactile, giving a small lift to a reveal without pulling attention away from the words on screen.