diff --git a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
index 05a8f3c..8747c3a 100644
--- a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportHelper.cs
@@ -34,7 +34,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
 
                 foreach (var hour in fixedHours)
                 {
-                    axisY.Add(hourlyAvg.TryGetValue(hour, out int val) ? val : 80); // 缺省用80填充
+                    axisY.Add(hourlyAvg.TryGetValue(hour, out int val) ? val : 0); 
                 }
             }