diff --git a/IRaCIS.Core.Application/Service/QC/DTO/QCListViewModel.cs b/IRaCIS.Core.Application/Service/QC/DTO/QCListViewModel.cs
index 340dfaf8d..6f5393bca 100644
--- a/IRaCIS.Core.Application/Service/QC/DTO/QCListViewModel.cs
+++ b/IRaCIS.Core.Application/Service/QC/DTO/QCListViewModel.cs
@@ -231,6 +231,9 @@ namespace IRaCIS.Core.Application.Contracts
         public DateTime? EarliestScanDate { get; set; }
         public DateTime? LatestScanDate { get; set; }
 
+        public string EarliestScanDateStr => EarliestScanDate?.ToString("yyyy-MM-dd") ?? string.Empty;
+        public string LatestScanDateStr => LatestScanDate?.ToString("yyyy-MM-dd") ?? string.Empty;
+
         public DateTime? SubmitTime { get; set; }
 
 
@@ -293,7 +296,7 @@ namespace IRaCIS.Core.Application.Contracts
         public string LatestReplyUserName { get; set; } = String.Empty;
 
         public string Content { get; set; } = string.Empty;
-        public string ContentReplaced => Content.Replace("<br>","").Replace("<br/>", "").Replace("<div style='margin-left:20px'>", "").Replace("</div>","");
+        public string ContentReplaced => Content.Replace("<br>", "").Replace("<br/>", "").Replace("<div style='margin-left:20px'>", "").Replace("</div>", "");
 
         [DictionaryTranslateAttribute("ChallengeIsClosed")]
         public bool IsClosed { get; set; }
@@ -740,6 +743,8 @@ namespace IRaCIS.Core.Application.Contracts
 
         public DateTime? LatestScanDate { get; set; }
 
+        public string LatestScanDateStr => LatestScanDate?.ToString("yyyy-MM-dd") ?? string.Empty;
+
         public List<string> ModalityList { get; set; }
 
         public string Modalitys => string.Join(',', ModalityList);
diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
index ccb1ea11b..53d4b2376 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
@@ -88,11 +88,14 @@ namespace IRaCIS.Application.Contracts
         [ExcelFormat("yyyy-MM-dd")]
         public DateTime? RemoveTime { get; set; }
 
+        public string RemoveTimeStr=> RemoveTime?.ToString("yyyy-MM-dd") ?? string.Empty;
+
 
         //[ExporterHeader(Format = "yyyy-mm-DD")]
         [ExcelFormat("yyyy-MM-dd")]
         public DateTime? JoinTime { get; set; }
 
+        public string JoinTimeStr => JoinTime?.ToString("yyyy-MM-dd") ?? string.Empty;
 
         //[ExporterHeader(Format = "yyyy-mm-DD hh:mm:ss")]
         [ExcelFormat("yyyy-MM-dd HH:mm:ss")]