diff --git a/en/advanced/extension/api_based_extension/README.md b/en/advanced/extension/api_based_extension/README.md
index 44cc974..167d55e 100644
--- a/en/advanced/extension/api_based_extension/README.md
+++ b/en/advanced/extension/api_based_extension/README.md
@@ -264,4 +264,4 @@ Now, this API endpoint is accessible publicly. You can configure this endpoint i
 
 We recommend that you use Cloudflare Workers to deploy your API extension, because Cloudflare Workers can easily provide a public address and can be used for free.
 
-[cloudflare_workers.md](./cloudflare_workers.md "mention")
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+[cloudflare\_workers.md](./cloudflare\_workers.md "mention")
\ No newline at end of file