diff --git a/Tiobon.Core.Model/View/Ghre/Ghre_CourseWareAttachment.Dto.View.cs b/Tiobon.Core.Model/View/Ghre/Ghre_CourseWareAttachment.Dto.View.cs
index 938fbe49..8366d755 100644
--- a/Tiobon.Core.Model/View/Ghre/Ghre_CourseWareAttachment.Dto.View.cs
+++ b/Tiobon.Core.Model/View/Ghre/Ghre_CourseWareAttachment.Dto.View.cs
@@ -36,5 +36,5 @@ public class Ghre_CourseWareAttachmentDto : Ghre_CourseWareAttachment
     /// <summary>
     /// 已学习进度百分比
     /// </summary> 
-    public decimal? HasLearnPercent { get; set; }
+    public decimal? HasLearnPercent { get; set; } = 0;
 }