diff --git a/YD_YiLu/Services/Impl/DeviceSyncService.cs b/YD_YiLu/Services/Impl/DeviceSyncService.cs
index 033b665..86d15f1 100644
--- a/YD_YiLu/Services/Impl/DeviceSyncService.cs
+++ b/YD_YiLu/Services/Impl/DeviceSyncService.cs
@@ -1125,7 +1125,7 @@ namespace YD_YiLu.Api.Services.Impl
                         new YtpGradeListItem
                         {
                             Time = GetYtpSummaryTime(dto.DateType),
-                            Duration = "0",
+                            Duration = SecondsToWholeHours(0),
                             Count = "0"
                         }
                     };
@@ -1138,7 +1138,7 @@ namespace YD_YiLu.Api.Services.Impl
                     .Select(day => new YtpGradeListItem
                     {
                         Time = day.ToString("MM-dd"),
-                        Duration = "0",
+                        Duration = SecondsToWholeHours(0),
                         Count = "0"
                     })
                     .ToList();
@@ -1158,7 +1158,7 @@ namespace YD_YiLu.Api.Services.Impl
                     new YtpGradeListItem
                     {
                         Time = GetYtpSummaryTime(dto.DateType),
-                        Duration = SecondsToHours(totalSeconds),
+                        Duration = SecondsToWholeHours(totalSeconds),
                         Count = trains.Count.ToString()
                     }
                 };
@@ -1176,7 +1176,7 @@ namespace YD_YiLu.Api.Services.Impl
                         return new YtpGradeListItem
                         {
                             Time = day.ToString("MM-dd"),
-                            Duration = SecondsToHours(daySeconds),
+                            Duration = SecondsToWholeHours(daySeconds),
                             Count = dayTrains.Count.ToString()
                         };
                     })