diff --git a/IRaCIS.Core.Domain/Reading/ReadingFormAnswer/ReadingTaskQuestionAnswer.cs b/IRaCIS.Core.Domain/Reading/ReadingFormAnswer/ReadingTaskQuestionAnswer.cs
index d65ba823c..44ed242fb 100644
--- a/IRaCIS.Core.Domain/Reading/ReadingFormAnswer/ReadingTaskQuestionAnswer.cs
+++ b/IRaCIS.Core.Domain/Reading/ReadingFormAnswer/ReadingTaskQuestionAnswer.cs
@@ -38,5 +38,5 @@ public class ReadingTaskQuestionAnswer : BaseAddAuditEntity
     /// <summary>
     /// PCWG 临时Answer
     /// </summary>
-    public string? PCWGInterimAnswer { get; set; }
+    public string? PCWGInterimAnswer { get; set; } = null;
 }