diff --git a/Myshipping.Application/Event/BillTraceSubscriber.cs b/Myshipping.Application/Event/BillTraceSubscriber.cs
index cae27b7c..28f69664 100644
--- a/Myshipping.Application/Event/BillTraceSubscriber.cs
+++ b/Myshipping.Application/Event/BillTraceSubscriber.cs
@@ -117,7 +117,7 @@ namespace Myshipping.Application.Event
                 YardCode = order.YARDID == "" ? null : order.YARDID,
                 CARRIER = order.CARRIER == "" ? null : order.CARRIER,
                 CARRIERID = order.CARRIERID == "" ? null : order.CARRIERID,
-                isBook = false,
+                isBook = order.IsBookingYZ is "2" or "3",
                 AlertEmail = string.Join(";", emailList)
             });
 
diff --git a/Myshipping.Application/Service/BookingOrder/Dto/BillTraceDto.cs b/Myshipping.Application/Service/BookingOrder/Dto/BillTraceDto.cs
index 9d87da93..b4f71936 100644
--- a/Myshipping.Application/Service/BookingOrder/Dto/BillTraceDto.cs
+++ b/Myshipping.Application/Service/BookingOrder/Dto/BillTraceDto.cs
@@ -33,6 +33,9 @@ namespace Myshipping.Application.Service.BookingOrder.Dto
 
         public string CARRIER { get; set; }
 
+        /// <summary>
+        /// 是否订阅港后运踪
+        /// </summary>
         public bool isBook { get; set; }
 
         public string AlertEmail { get; set; }