diff --git a/app/api/license.py b/app/api/license.py
index b885664..f22b209 100644
--- a/app/api/license.py
+++ b/app/api/license.py
@@ -151,7 +151,7 @@ def generate_licenses():
         product_id = data.get('product_id')
         count = data.get('count', 1)
         license_type = data.get('type', 1)  # 0=试用, 1=正式
-        valid_days = data.get('valid_days', 365)
+        valid_days = data.get('valid_days')  # 不设置默认值，保持None
         prefix = data.get('prefix', '')
         length = data.get('length', 32)
 
@@ -182,6 +182,10 @@ def generate_licenses():
                 'message': '产品不存在'
             }), 404
 
+        # 设置默认有效期
+        if valid_days is None:
+            valid_days = 365
+
         # 试用卡密最大有效期限制
         if license_type == 0 and valid_days > 90:
             return jsonify({
diff --git a/app/web/templates/license/generate.html b/app/web/templates/license/generate.html
index f1f10c5..4bfd526 100644
--- a/app/web/templates/license/generate.html
+++ b/app/web/templates/license/generate.html
@@ -124,11 +124,16 @@ function generateLicenses() {
         product_id: document.getElementById('product_id').value,
         type: parseInt(document.getElementById('license_type').value),
         count: parseInt(document.getElementById('quantity').value),
-        valid_days: document.getElementById('expire_days').value ? parseInt(document.getElementById('expire_days').value) : 365,
+        valid_days: document.getElementById('expire_days').value ? parseInt(document.getElementById('expire_days').value) : null,
         prefix: '',
         length: 32
     };
     
+    // 如果valid_days为null，删除该属性
+    if (formData.valid_days === null) {
+        delete formData.valid_days;
+    }
+    
     // 基础验证
     if (!formData.product_id) {
         showNotification('请选择产品', 'warning');
diff --git a/app/web/views.py b/app/web/views.py
index 63699f7..0952888 100644
--- a/app/web/views.py
+++ b/app/web/views.py
@@ -41,6 +41,13 @@ def product_detail(product_id):
     if not product:
         flash('产品不存在', 'error')
         return redirect(url_for('web.products'))
+    
+    # 获取产品统计信息
+    stats = product.get_stats()
+    # 将统计信息添加到产品对象中
+    for key, value in stats.items():
+        setattr(product, key, value)
+    
     return render_template('product/detail.html', product=product)
 
 @web_bp.route('/products/<product_id>/edit')