diff --git a/app/Http/Controllers/Module/HostController.php b/app/Http/Controllers/Module/HostController.php
index fcf422d..3e587c0 100644
--- a/app/Http/Controllers/Module/HostController.php
+++ b/app/Http/Controllers/Module/HostController.php
@@ -37,7 +37,8 @@ public function store(Request $request): Response|JsonResponse
     {
         // 存储计费项目
         $this->validate($request, [
-            'status' => 'required|in:running,stopped,error,suspended,pending',
+            'status' => 'required|in:draft,running,stopped,error,suspended,pending',
+            'billing_cycle' => 'nullable|in:monthly,quarterly,semi-annually,annually,biennially,triennially',
             'price' => 'required|numeric',
             'user_id' => 'required|integer|exists:users,id',
         ]);
@@ -55,11 +56,12 @@ public function store(Request $request): Response|JsonResponse
 
         $data = [
             'name' => $name,
-            'status' => $request->input('status'),
-            'price' => $request->input('price'),
-            'managed_price' => $request->input('managed_price'),
             'user_id' => $user->id,
             'module_id' => auth('module')->id(),
+            'price' => $request->input('price'),
+            'managed_price' => $request->input('managed_price'),
+            'billing_cycle' => $request->input('billing_cycle'),
+            'status' => $request->input('status'),
         ];
 
         $host = (new Host)->create($data);
diff --git a/app/Models/Host.php b/app/Models/Host.php
index caf021d..7ce5add 100644
--- a/app/Models/Host.php
+++ b/app/Models/Host.php
@@ -2,7 +2,7 @@
 
 namespace App\Models;
 
-use App\Events\Users;
+use App\Exceptions\User\BalanceNotEnoughException;
 use App\Jobs\Host\HostJob;
 use App\Jobs\Host\UpdateOrDeleteHostJob;
 use GeneaLabs\LaravelModelCaching\Traits\Cachable;
@@ -22,17 +22,20 @@ class Host extends Model
         'module_id',
         'user_id',
         'price',
+        'managed_price',
         'configuration',
         'status',
-        'managed_price',
+        'billing_cycle',
+        'next_due_at',
         'suspended_at',
     ];
 
     protected $casts = [
-        // 'configuration' => 'array',
-        'suspended_at' => 'datetime',
         'price' => 'decimal:2',
         'managed_price' => 'decimal:2',
+        'configuration' => 'array',
+        'next_due_at' => 'datetime',
+        'suspended_at' => 'datetime',
     ];
 
     /** @noinspection PhpUndefinedMethodInspection */
@@ -68,6 +71,21 @@ public function scopeActive($query)
         return $query->whereIn('status', ['running', 'stopped']);
     }
 
+    public function scopeDraft($query)
+    {
+        return $query->where('status', 'draft');
+    }
+
+    public function scopeExpiring($query)
+    {
+        return $query->where('status', 'running')->where('next_due_at', '<=', now()->addDays(7));
+    }
+
+    public function scopeSuspended($query)
+    {
+        return $query->where('status', 'suspended');
+    }
+
     public function scopeThisUser($query, $module = null)
     {
         if ($module) {
@@ -77,6 +95,88 @@ public function scopeThisUser($query, $module = null)
         }
     }
 
+    public function isDraft(): bool
+    {
+        return $this->status === 'draft';
+    }
+
+    public function isRunning(): bool
+    {
+        return $this->status === 'running';
+    }
+
+    public function isStopped(): bool
+    {
+        return $this->status === 'stopped';
+    }
+
+    public function isSuspended(): bool
+    {
+        return $this->status === 'suspended';
+    }
+
+    public function getNewDueDate(): string
+    {
+        $this->next_due_at = $this->next_due_at ?? now();
+
+        return match ($this->billing_cycle) {
+            'monthly' => $this->next_due_at->addMonth(),
+            'quarterly' => $this->next_due_at->addMonths(3),
+            'semi-annually' => $this->next_due_at->addMonths(6),
+            'annually' => $this->next_due_at->addYear(),
+            'biennially' => $this->next_due_at->addYears(2),
+            'triennially' => $this->next_due_at->addYears(3),
+            default => null,
+        };
+    }
+
+    public function getRenewPrice(): string
+    {
+        return match ($this->billing_cycle) {
+            'monthly' => $this->getPrice(),
+            'quarterly' => bcmul($this->getPrice(), 3),
+            'semi-annually' => bcmul($this->getPrice(), 6),
+            'annually' => bcmul($this->getPrice(), 12),
+            'biennially' => bcmul($this->getPrice(), 24),
+            'triennially' => bcmul($this->getPrice(), 36),
+            default => 0,
+        };
+    }
+
+    public function renew(): bool
+    {
+        $price = $this->getRenewPrice();
+
+        $description = '续费 '.$this->name.' 周期: '.$this->billing_cycle;
+
+        try {
+            $this->user->reduce($price, $description, true, [
+                'host_id' => $this->id,
+                'module_id' => $this->module_id,
+            ]);
+        } catch (BalanceNotEnoughException) {
+            return false;
+        }
+
+        $this->addLog($price);
+
+        $this->next_due_at = $this->getNewDueDate();
+
+        $this->save();
+
+        return true;
+    }
+
+    public function isOverdue(): bool
+    {
+        return now()->gt($this->next_due_at);
+    }
+
+    public function isCycle(): bool
+    {
+        return $this->billing_cycle !== null;
+    }
+
     public function safeDelete(): bool
     {
         // 如果创建时间大于大于 1 小时
@@ -116,7 +216,7 @@ public function cost(string $amount = null, $auto = true, $description = null):
         $append_description = '';
         if ($user_group) {
             if ($user_group->discount !== 100 && $user_group->discount !== null) {
-                $real_price = bcmul($real_price, bcdiv($user_group->discount, '100', 4), 4);
+                $real_price = $user_group->getCostPrice($real_price);
 
                 $append_description = ' (折扣 '.$user_group->discount.'%)';
             }
@@ -181,8 +281,6 @@ public function cost(string $amount = null, $auto = true, $description = null):
 
         $this->addLog($real_price);
 
-        broadcast(new Users($this->user, 'balances.amount.reduced', $this->user));
-
         if ($left < 0) {
             $this->update([
                 'status' => 'suspended',
diff --git a/app/Observers/HostObserver.php b/app/Observers/HostObserver.php
index 4604b2c..173d5aa 100644
--- a/app/Observers/HostObserver.php
+++ b/app/Observers/HostObserver.php
@@ -21,6 +21,10 @@ public function creating(Host $host): void
         if ($host->managed_price !== null) {
             $host->managed_price = bcdiv($host->managed_price, 1, 2);
         }
+
+        if ($host->billing_cycle !== null) {
+            $host->next_due_at = $host->getNewDueDate();
+        }
     }
 
     /**
diff --git a/app/View/Components/BillingCycle.php b/app/View/Components/BillingCycle.php
new file mode 100644
index 0000000..1a566d7
--- /dev/null
+++ b/app/View/Components/BillingCycle.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\View\Components;
+
+use Illuminate\View\Component;
+
+class BillingCycle extends Component
+{
+    public string $cycle = 'dynamic';
+
+    /**
+     * Create a new component instance.
+     *
+     * @return void
+     */
+    public function __construct(null|string $cycle = 'dynamic')
+    {
+        $this->cycle = $cycle ?? 'dynamic';
+    }
+
+    /**
+     * Get the view / contents that represent the component.
+     *
+     * @return string
+     */
+    public function render(): string
+    {
+        return trans('hosts.' . $this->cycle);
+    }
+}
diff --git a/lang/zh_CN/hosts.php b/lang/zh_CN/hosts.php
new file mode 100644
index 0000000..51b30d5
--- /dev/null
+++ b/lang/zh_CN/hosts.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+return [
+    'monthly' => '每月',
+    'quarterly' => '每季度',
+    'semi-annually' => '每半年',
+    'annually' => '每年',
+    'biennially' => '每两年',
+    'triennially' => '每三年',
+    'dynamic' => '动态',
+];
diff --git a/resources/views/components/billing-cycle.blade.php b/resources/views/components/billing-cycle.blade.php
new file mode 100644
index 0000000..dbb0775
--- /dev/null
+++ b/resources/views/components/billing-cycle.blade.php
@@ -0,0 +1,3 @@
+<div>
+    <!-- Simplicity is the consequence of refined emotions. - Jean D'Alembert -->
+</div>
\ No newline at end of file