diff --git a/app/Http/Controllers/Admin/ReplyController.php b/app/Http/Controllers/Admin/ReplyController.php
index 84e61f4..0edcb12 100644
--- a/app/Http/Controllers/Admin/ReplyController.php
+++ b/app/Http/Controllers/Admin/ReplyController.php
@@ -25,7 +25,7 @@ public function store(Request $request, WorkOrder $work_order): RedirectResponse
             'content' => 'required|string',
         ]);
 
-        if (!$work_order->isOpen()) {
+        if ($work_order->isFailure()) {
             return back()->with('error', '工单还未就绪。');
         }
 
diff --git a/app/Models/WorkOrder/WorkOrder.php b/app/Models/WorkOrder/WorkOrder.php
index 62543f4..cfc1cb3 100644
--- a/app/Models/WorkOrder/WorkOrder.php
+++ b/app/Models/WorkOrder/WorkOrder.php
@@ -9,6 +9,7 @@
 use App\Models\User;
 use App\Notifications\WorkOrder as WorkOrderNotification;
 use GeneaLabs\LaravelModelCaching\Traits\Cachable;
+use Illuminate\Broadcasting\PrivateChannel;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
@@ -83,13 +84,6 @@ protected static function boot()
         });
     }
 
-    public function routeNotificationForMail(WorkOrderNotification $work_order): array
-    {
-        $user = $work_order->user;
-
-        return [$user->email => $user->name];
-    }
-
     public function scopeThisModule($query)
     {
         return $query->where('module_id', auth('module')->id());
@@ -148,4 +142,16 @@ public function safeDelete(): bool
 
         return true;
     }
+
+    public function routeNotificationForMail(WorkOrderNotification $work_order): array
+    {
+        $user = $this->user;
+
+        return [$user->email => $user->name];
+    }
+
+    public function receivesBroadcastNotificationsOn(): string
+    {
+        return new PrivateChannel('users.' . $this->id);
+    }
 }