diff --git a/be/app/Exceptions/Handler.php b/be/app/Exceptions/Handler.php
index 1cdfb319..15fa26e5 100644
--- a/be/app/Exceptions/Handler.php
+++ b/be/app/Exceptions/Handler.php
@@ -19,7 +19,7 @@ protected function convertValidationExceptionToResponse(\Illuminate\Validation\V
             return $e->response;
         }
 
-        return \Response::json([
+        return response()->json([
             'errorCode' => 40000,
             'errorInfo' => $e->validator->getMessageBag()->getMessages()
         ], 400);
diff --git a/be/app/Helper.php b/be/app/Helper.php
index 8a425b6c..60d140a5 100644
--- a/be/app/Helper.php
+++ b/be/app/Helper.php
@@ -68,7 +68,6 @@ public static function abortAPI(int $errorCode): never
                 40003 => '部分查询参数与查询帖子类型要求不匹配',
                 40004 => '排序方式与查询帖子类型要求不匹配',
                 40005 => '提供了多个唯一查询参数',
-                40006 => '指定查询的贴吧不存在',
             ],
             401 => [
                 40101 => 'Google reCAPTCHA 验证未通过 请刷新页面/更换设备/网络环境后重试',
@@ -77,6 +76,7 @@ public static function abortAPI(int $errorCode): never
                 40401 => '帖子查询结果为空',
                 40402 => '用户查询结果为空',
                 40403 => '吧帖量统计查询结果为空',
+                40406 => '指定查询的贴吧不存在',
             ],
             500 => [
                 50001 => '数据库中存在多个贴吧表存储了该 ID 的帖子',
@@ -94,10 +94,7 @@ public static function abortAPI(int $errorCode): never
         if ($errorInfo === null) {
             throw new \InvalidArgumentException('Given error code doesn\'t existed');
         }
-        \Response::json([
-            'errorCode' => $errorCode,
-            'errorInfo' => $errorInfo
-        ], $statusCode)->send();
+        response()->json(compact('errorCode', 'errorInfo'), $statusCode)->throwResponse();
         exit;
     }
 
diff --git a/be/app/Http/Controllers/ThreadsIDQuery.php b/be/app/Http/Controllers/ThreadsIDQuery.php
new file mode 100644
index 00000000..949ed061
--- /dev/null
+++ b/be/app/Http/Controllers/ThreadsIDQuery.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Eloquent\Model\Forum;
+use App\Eloquent\Model\Post\PostFactory;
+use App\Helper;
+use Illuminate\Pagination\Cursor;
+
+class ThreadsIDQuery extends Controller
+{
+    public function query(\Illuminate\Http\Request $request, int $fid): array
+    {
+        ['cursor' => $cursor] = $request->validate([
+            'cursor' => 'integer'
+        ]) + ['cursor' => 0];
+        Helper::abortAPIIfNot(40406, (new Forum())->fid($fid)->exists());
+        $thread = PostFactory::newThread($fid);
+        $primaryKey = $thread->getTable() . '.tid';
+        $paginators = $thread->cursorPaginate(1000, columns: 'tid', cursor: new Cursor([$primaryKey => $cursor]));
+
+        return [
+            'pages' => [
+                'currentCursor' => $paginators->cursor()->parameter($primaryKey),
+                'nextCursor' => $paginators->nextCursor()->parameter($primaryKey)
+            ],
+            'tid' => array_column($paginators->items(), 'tid')
+        ];
+    }
+}
diff --git a/be/app/Http/PostsQuery/IndexQuery.php b/be/app/Http/PostsQuery/IndexQuery.php
index a2511063..a478cac0 100644
--- a/be/app/Http/PostsQuery/IndexQuery.php
+++ b/be/app/Http/PostsQuery/IndexQuery.php
@@ -64,7 +64,7 @@ public function query(QueryParams $params, ?string $cursor): self
                 $fid = $getFidByPostIDParam($postIDParamName, $postIDParamValue);
                 $queries = $getQueryBuilders($fid);
             } else {
-                Helper::abortAPI(40006);
+                Helper::abortAPI(40406);
             }
         } elseif ($hasPostIDParam) { // query by post ID only
             $fid = $getFidByPostIDParam($postIDParamName, $postIDParamValue);
diff --git a/be/routes/api.php b/be/routes/api.php
index 471eb549..9193861f 100644
--- a/be/routes/api.php
+++ b/be/routes/api.php
@@ -1,13 +1,12 @@
 <?php
 
-use App\Http\Controllers\PostsQuery;
-use App\Http\Controllers\UsersQuery;
+use App\Http\Controllers;
 use App\Http\Middleware\ReCAPTCHACheck;
 use Illuminate\Support\Facades\Route;
 
 Route::get('/forums', static fn () => \App\Eloquent\Model\Forum::all()->toArray());
-
+Route::get('/forums/{fid}/threads/tid', [Controllers\ThreadsIDQuery::class, 'query']);
 Route::middleware(ReCAPTCHACheck::class)->group(static function () {
-    Route::get('/posts', [PostsQuery::class, 'query']);
-    Route::get('/users', [UsersQuery::class, 'query']);
+    Route::get('/posts', [Controllers\PostsQuery::class, 'query']);
+    Route::get('/users', [Controllers\UsersQuery::class, 'query']);
 });