diff --git a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
index 39cc409..c186424 100644
--- a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
@@ -15,7 +15,11 @@ namespace YD_AllHeartRates.Api.Services.Impl
         public static ChartDataDto BuildHeartRateTrend(List<HeartRateData> data)
         {
             if (data == null || data.Count == 0)
-                return new ChartDataDto();
+                return new ChartDataDto()
+                {
+                    AxisX = new List<string>() { "8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00" },
+                    AxisY = new List<int>() { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+                };
 
             // 按小时分组计算平均值（四舍五入）
             var hourlyAvg = data