diff --git a/App/Modules/SicModules/PMs/RecipeExecutions/PreProcess.cs b/App/Modules/SicModules/PMs/RecipeExecutions/PreProcess.cs
index 66b2aba..a13fb92 100644
--- a/App/Modules/SicModules/PMs/RecipeExecutions/PreProcess.cs
+++ b/App/Modules/SicModules/PMs/RecipeExecutions/PreProcess.cs
@@ -482,7 +482,7 @@ namespace SicModules.PMs.RecipeExecutions
         /// </summary>
         protected void WaitTempratureToBeginProcess(int id,double targetTemp,int timeout)
         {
-            string reason = String.Empty;
+            string reason = $"Wait targetTemp reaches {targetTemp}℃ begin process, with timeout period of {timeout} seconds.";
             Tuple<bool, Result> ret = Wait(id, () =>
             {
                 if (PmDevice.TC1.L2PVFeedBack >= targetTemp)