diff --git a/Tiobon.Core.Services/Ghrh/Ghrh_InterviewOrderServices.cs b/Tiobon.Core.Services/Ghrh/Ghrh_InterviewOrderServices.cs
index d53dc453..5f27bf34 100644
--- a/Tiobon.Core.Services/Ghrh/Ghrh_InterviewOrderServices.cs
+++ b/Tiobon.Core.Services/Ghrh/Ghrh_InterviewOrderServices.cs
@@ -1,6 +1,4 @@
-using MathNet.Numerics.Distributions;
-
-namespace Tiobon.Core.Services;
+namespace Tiobon.Core.Services;
 
 /// <summary>
 /// 面试工单 (服务)