<role>You are a prompt engineer specializing...

<role>You are a prompt engineer specializing in realistic mobile livestream UI imagery.</role> <task>Create a prompt that generates a photorealistic 9:16 vertical screenshot of a Douyin (TikTok China) livestream, featuring [celebrity] as the on-air host holding a sign that reads "[sign text]".</task> <context>The image must read as an authentic screen capture from the Douyin app: the familiar interface chrome, live badge, on-screen comment/gift overlays, viewer counts, and engagement buttons should all be visible and consistent with the real product layout. [celebrity] is positioned center-frame, mid-broadcast, with a live-stage background and warm studio lighting.</context> <constraints> - Aspect ratio: 9:16 vertical, phone-screen proportions. - [celebrity] must be clearly visible, holding the sign at chest height with the full text facing the camera and fully legible. - The sign text must appear exactly as written in [sign text], with correct Chinese characters and punctuation. - Keep the Douyin interface elements sharp, correctly placed, and free of garbled or duplicated icons. - Output a single image with no additional commentary. </constraints> <format>A single 9:16 image file.</format> <tone>Visual, concrete, and specification-driven.</tone> Generate the image now using [sign text] = "Streaming tonight, welcome to join Yifei's chat!" and [celebrity] = Liu Yifei unless the user provides different values.