diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 8ec3d981..920af3e0 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -136,6 +136,12 @@ class SfLogSerializer(CustomModelSerializer):
                 if mgroup.need_enm:
                     cal_enstat_when_team_change.delay(instance.id)
             return instance
+        
+    def to_representation(self, instance):
+        ret = super().to_representation(instance)
+        if "shut_sec" in ret:
+            ret["shut_sec"] = "{:.2f}".format(round(ret['run_sec']/3600, 2))
+        return ret
     # def to_internal_value(self, data):
     #     if hasattr(self.Meta, 'update_fields') and self.context['request'].method in ['PUT', 'PATCH']:
     #         u_fields = self.Meta.update_fields