diff --git a/docs/zh-cn/stage-3/cross-platform/3.8-pwa-local-app/images/image8.jpg b/docs/zh-cn/stage-3/cross-platform/3.8-pwa-local-app/images/image8.png
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rename from docs/zh-cn/stage-3/cross-platform/3.8-pwa-local-app/images/image8.jpg
rename to docs/zh-cn/stage-3/cross-platform/3.8-pwa-local-app/images/image8.png