diff --git a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
index aebb476..92263a7 100644
--- a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
@@ -71,7 +71,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
             var cacheKey = $"HeartRateData_{schoolCode}";
             var data = _caching.Get<List<HeartRateData>>(cacheKey);
 
-            if (data == null)
+            if (data == null || data.Count == 0)
             {
                 data = await _userContext.HeartRateData
                     .Where(x => x.SchoolCode == schoolCode && x.ScoreTime > dayStart && x.ScoreTime <= dayEnd)
@@ -82,7 +82,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
             }
 
             res.SportsData.OnlineDevicesCount = data.GroupBy(x => x.StudentNo).Count();
-            
+
             res.SportsData.AvgHeartRate = (int)data.Select(x => x.Value).DefaultIfEmpty(0).Average();
 
             var durationsByStudent = HeartRateReportHelper.CalculateDurations(
@@ -155,7 +155,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
             // 先尝试从缓存读取
             var allData = _caching.Get<List<HeartRateData>>(cacheKey);
 
-            if (allData == null)
+            if (allData == null|| allData.Count==0)
             {
                 allData = await _userContext.HeartRateData
                     .Where(x => x.SchoolCode == schoolCode && x.ScoreTime > dayStart && x.ScoreTime <= dayEnd)
@@ -167,7 +167,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
 
             var data = allData.Where(x => x.GradeId == gradeId).ToList();
 
-            res.SportsData.OnlineDevicesCount = data.GroupBy(x => x.StudentNo).Count(); 
+            res.SportsData.OnlineDevicesCount = data.GroupBy(x => x.StudentNo).Count();
             res.SportsData.AvgHeartRate = (int)data.Select(x => x.Value).DefaultIfEmpty(0).Average();
 
 
@@ -237,7 +237,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
             // 先尝试从缓存读取
             var allData = _caching.Get<List<HeartRateData>>(cacheKey);
 
-            if (allData == null)
+            if (allData == null || allData.Count == 0)
             {
                 allData = await _userContext.HeartRateData
                     .Where(x => x.SchoolCode == schoolCode && x.ScoreTime > dayStart && x.ScoreTime <= dayEnd)
@@ -292,7 +292,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
             // 先尝试从缓存读取
             var allData = _caching.Get<List<HeartRateData>>(cacheKey);
 
-            if (allData == null)
+            if (allData == null || allData.Count == 0)
             {
                 allData = await _userContext.HeartRateData
                     .Where(x => x.SchoolCode == schoolCode && x.ScoreTime > dayStart && x.ScoreTime <= dayEnd)
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
index 90b9a40..af66e36 100644
--- a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
+++ b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+580d586b2d20254267b1182a8ceff393c252da81")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+4be147ed0cb397741b6ca580b8b7ce5452603a18")]
 [assembly: System.Reflection.AssemblyProductAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyTitleAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
index b72df2b..900b486 100644
--- a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
+++ b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
@@ -1 +1 @@
-d0fd70ca558eb27a63b8502db6933ff8d4d403e75a3eb07f44cb84badd7aeaea
+06c8e83f866dbe7a14cff35782bb4ee85519838545231f3e9dabb994b6d2fb17
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll
index e6726fd..1520333 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb
index a6d6eb7..d10f674 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb and b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe b/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe
index 745d335..2924217 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe and b/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll
index 45b7c2d..e08415c 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll
index 45b7c2d..e08415c 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll differ