diff --git a/app/api/s/route.ts b/app/api/s/route.ts
index 6d48a40..8c592b9 100644
--- a/app/api/s/route.ts
+++ b/app/api/s/route.ts
@@ -18,7 +18,7 @@ export async function POST(req: NextRequest) {
       browser,
     } = await req.json();
 
-    if (!slug || !ip) return Response.json(null);
+    if (!slug || !ip) return Response.json("Missing[0000]");
 
     const res = await getUrlBySuffix(slug);
     if (res?.target && res?.active === 1) {
@@ -28,7 +28,7 @@ export async function POST(req: NextRequest) {
       const expirationTime = createdAt + expirationMilliseconds;
 
       if (res.expiration !== "-1" && now > expirationTime) {
-        return Response.json(null);
+        return Response.json("Expired[0001]");
       }
 
       // console.log("[api/s]", device, browser);
@@ -48,8 +48,8 @@ export async function POST(req: NextRequest) {
       });
       return Response.json(res.target);
     }
-    return Response.json(null);
+    return Response.json("Disabled[0002]");
   } catch (error) {
-    return Response.json(null);
+    return Response.json("Error[0003]");
   }
 }
diff --git a/config/docs.ts b/config/docs.ts
index 2060a25..bb061ba 100644
--- a/config/docs.ts
+++ b/config/docs.ts
@@ -26,22 +26,6 @@ export const docsConfig: DocsConfig = {
           href: "/docs/short-urls",
           icon: "page",
         },
-
-        // {
-        //   title: "Terms of Service",
-        //   href: "/terms",
-        //   icon: "page",
-        // },
-        // {
-        //   title: "Privacy Policy",
-        //   href: "/privacy",
-        //   icon: "page",
-        // },
-        // {
-        //   title: "Newsletter",
-        //   href: "/docs/newsletter",
-        //   icon: "page",
-        // },
       ],
     },
     {
diff --git a/content/docs/short-urls.mdx b/content/docs/short-urls.mdx
index 79b56ea..bc950ca 100644
--- a/content/docs/short-urls.mdx
+++ b/content/docs/short-urls.mdx
@@ -27,3 +27,24 @@ WR.DO provides a simple access statistics feature that can be used to track the
 - **Expiration**: The short link will expire after the specified time.
 
 Once the generated short chain becomes invalid, it will not be deleted. When accessing the short chain again, it will be redirected to this page. Users can reset the short chain validity period to activate.
+
+## Problems
+
+### Expired Links
+
+If you see this, it means that this short link has expired. 
+Please contact the creator of this short link to reactivate, or create a new short link.
+
+### Missing links
+
+If you see this, it means that this short link does not exist.
+Please contact the creator of this short link to reactivate, or create a new short link.
+
+### Disabled links
+
+If you see this, it means that this short link has been disabled.
+Please contact the creator of this short link to reactivate, or create a new short link.
+
+### Error links
+
+If you see this, it means that this short link has an error. Please contact administrator.
\ No newline at end of file
diff --git a/middleware.ts b/middleware.ts
index fc53fb7..365143f 100644
--- a/middleware.ts
+++ b/middleware.ts
@@ -10,6 +10,13 @@ export const config = {
   matcher: ["/((?!api|_next/static|_next/image|favicon.ico).*)"],
 };
 
+const redirectMap = {
+  "Missing[0000]": "/docs/short-urls#missing-links",
+  "Expired[0001]": "/docs/short-urls#expired-links",
+  "Disabled[0002]": "/docs/short-urls#disabled-links",
+  "Error[0003]": "/docs/short-urls#error-links",
+};
+
 // 提取短链接处理逻辑
 async function handleShortUrl(req: NextAuthRequest) {
   if (!req.url.includes("/s/")) return NextResponse.next();
@@ -43,12 +50,28 @@ async function handleShortUrl(req: NextAuthRequest) {
   });
 
   if (!res.ok)
-    return NextResponse.redirect(`${siteConfig.url}/docs/short-urls`, 302);
+    return NextResponse.redirect(
+      `${siteConfig.url}${redirectMap["Error[0003]"]}`,
+      302,
+    );
 
   const target = await res.json();
-  return target
-    ? NextResponse.redirect(target, 302)
-    : NextResponse.redirect(`${siteConfig.url}/docs/short-urls`, 302);
+
+  if (!target || typeof target !== "string") {
+    return NextResponse.redirect(
+      `${siteConfig.url}${redirectMap["Error[0003]"]}`,
+      302,
+    );
+  }
+
+  if (target in redirectMap) {
+    return NextResponse.redirect(
+      `${siteConfig.url}${redirectMap[target]}`,
+      302,
+    );
+  }
+
+  return NextResponse.redirect(target, 302);
 }
 
 // 提取 slug
@@ -68,7 +91,6 @@ function parseUserAgent(ua: string) {
 }
 
 export default auth(async (req) => {
-  // console.log("请求地址", req.url);
   try {
     return await handleShortUrl(req);
   } catch (error) {
diff --git a/public/sw.js.map b/public/sw.js.map
index 0dde549..a69549b 100644
--- a/public/sw.js.map
+++ b/public/sw.js.map
@@ -1 +1 @@
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\ No newline at end of file