diff --git a/ai/serializers.py b/ai/serializers.py
index cc0a918..44ab987 100644
--- a/ai/serializers.py
+++ b/ai/serializers.py
@@ -5,11 +5,17 @@ from .models import AIAnalysis
 
 class AIAnalysisListSerializer(serializers.ModelSerializer):
     username = serializers.CharField(source="user.username")
-    class_name = serializers.CharField(source="user.class_name")
+    analysis_excerpt = serializers.SerializerMethodField()
 
     class Meta:
         model = AIAnalysis
-        fields = ["id", "create_time", "username", "class_name", "is_pinned"]
+        fields = ["id", "create_time", "username", "analysis_excerpt", "is_pinned"]
+
+    def get_analysis_excerpt(self, obj):
+        if not obj.analysis:
+            return ""
+        text = " ".join(obj.analysis.split())
+        return text[:120] if len(text) <= 120 else text[:120] + "…"
 
 
 class AIAnalysisDetailSerializer(serializers.ModelSerializer):