diff --git a/apps/badge/services/badge_image_service.py b/apps/badge/services/badge_image_service.py
index 6b013cf..755a018 100644
--- a/apps/badge/services/badge_image_service.py
+++ b/apps/badge/services/badge_image_service.py
@@ -148,26 +148,20 @@ def generate_i2i_stream(user, badge_image, image_bytes, prompt='', style=None,
         image_model = config.get('IMAGE_MODEL_NAME', 'doubao-seedream-4-5-251128')
         image_size = f'{width}x{height}'
 
-        # 尝试带参考图的生成，若 SDK 不支持则回退到纯文生图
-        try:
-            result = client.images.generate(
-                model=image_model,
-                prompt=full_prompt,
-                size=image_size,
-                response_format='url',
-                watermark=False,
-                reference_image=ref_url,
-                reference_strength=strength,
-            )
-        except TypeError:
-            logger.warning('Seedream SDK does not support reference_image, falling back to t2i')
-            result = client.images.generate(
-                model=image_model,
-                prompt=full_prompt,
-                size=image_size,
-                response_format='url',
-                watermark=False,
-            )
+        # 将前端 strength(0.1~1.0) 映射到 guidance_scale(1.0~20.0)
+        # strength 越大 → 越贴近参考图 → guidance_scale 越低(更依赖图片)
+        # strength 越小 → 越自由发挥 → guidance_scale 越高(更依赖提示词)
+        guidance = 1.0 + (1.0 - strength) * 19.0
+
+        result = client.images.generate(
+            model=image_model,
+            prompt=full_prompt,
+            size=image_size,
+            response_format='url',
+            watermark=False,
+            image=ref_url,
+            guidance_scale=guidance,
+        )
 
         temp_url = result.data[0].url
 
diff --git a/apps/devices/serializers.py b/apps/devices/serializers.py
index d237f69..e56d0d7 100644
--- a/apps/devices/serializers.py
+++ b/apps/devices/serializers.py
@@ -40,12 +40,13 @@ class DeviceBatchCreateSerializer(serializers.ModelSerializer):
 
 class DeviceSerializer(serializers.ModelSerializer):
     """设备序列化器"""
-    
+
+    device_type = DeviceTypeSerializer(read_only=True)
     device_type_info = DeviceTypeSerializer(source='device_type', read_only=True)
-    
+
     class Meta:
         model = Device
-        fields = ['id', 'sn', 'device_type', 'device_type_info', 'mac_address', 
+        fields = ['id', 'sn', 'device_type', 'device_type_info', 'mac_address',
                   'name', 'status', 'firmware_version', 'last_online_at', 'created_at']