diff --git a/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs b/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
index c4d345a..eeef06d 100644
--- a/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
+++ b/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
@@ -172,12 +172,12 @@ namespace YD_AllHeartRates.Api.Mqtt
                         if (string.IsNullOrWhiteSpace(ble.RawData)) continue;
 
                         var student = _studentList.FirstOrDefault(x => x.JumpRopeId == ble.BleName);
-                        if (student?.GradeId == 0 || student?.ClassId == 0) continue;
+                        if (student == null || student.GradeId == 0 || student.ClassId == 0) continue;
 
                         var data = ParseHexData(ble.RawData);
                         if (data == null) continue;
 
-                        int mfIndex = IndexOfSequence(data, new byte[] { 0xFF, 0x04, 0xFF, 0xCF });
+                        int mfIndex = Array.IndexOf(data, new byte[] { 0xFF, 0x04, 0xFF, 0xCF });
                         if (mfIndex < 0 || data.Length < mfIndex + 10) continue;
 
                         int jumpCount = data[mfIndex + 5] + (data[mfIndex + 6] << 8);
@@ -297,27 +297,5 @@ namespace YD_AllHeartRates.Api.Mqtt
             }
             if (buffer.Count > 0) yield return buffer;
         }
-        public static int IndexOfSequence(byte[] buffer, byte[] pattern)
-        {
-            if (pattern.Length == 0 || buffer.Length < pattern.Length)
-                return -1;
-
-            for (int i = 0; i <= buffer.Length - pattern.Length; i++)
-            {
-                bool matched = true;
-                for (int j = 0; j < pattern.Length; j++)
-                {
-                    if (buffer[i + j] != pattern[j])
-                    {
-                        matched = false;
-                        break;
-                    }
-                }
-                if (matched)
-                    return i;
-            }
-            return -1;
-        }
-
     }
 }
diff --git a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
index 00b485e..c4225b1 100644
--- a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
@@ -1,6 +1,7 @@
 
 using AutoMapper;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Internal;
 using OfficeOpenXml.FormulaParsing.Excel.Functions.DateTime;
 using System.Drawing;
 using System.Reflection.PortableExecutable;
@@ -24,6 +25,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
         private readonly LoginContext _loginContext;
         private string schoolCode;
         private readonly ICaching _caching;
+        private readonly Dictionary<string, JumpRopeData> _jumpDailyMap = new();
 
         /// <summary>
         /// 构造
@@ -147,11 +149,17 @@ namespace YD_AllHeartRates.Api.Services.Impl
             foreach (var student in studentList)
             {
                 var heartRateKey = $"heartRate:{student.StudentNo}";
-                var jumpRopeKey = $"jumpRope:{student.StudentNo}";
+                //var jumpRopeKey = $"jumpRope:{student.StudentNo}";
+
+                string jumpRopeKey = $"{student.StudentNo}_{DateTime.Now:yyyyMMdd}";
 
                 // 先从缓存拿
                 var heartRate = _caching.Get<HeartRateData>(heartRateKey);
-                var jumpRope = _caching.Get<JumpRopeData>(jumpRopeKey);
+
+                //var jumpRope = _caching.Get<JumpRopeData>(jumpRopeKey);
+
+                _jumpDailyMap.TryGetValue(jumpRopeKey, out var jumpRope);
+
 
                 // ❗心率缓存未命中 → 单独查数据库
                 //if (heartRate == null)
@@ -173,8 +181,8 @@ namespace YD_AllHeartRates.Api.Services.Impl
                 //        .OrderByDescending(x => x.ScoreTime)
                 //        .FirstOrDefaultAsync();
 
-                //    //if (jumpRope != null)
-                //    //    _caching.AddObject(jumpRopeKey, jumpRope, 60);
+                //    if (jumpRope != null)
+                //        _caching.AddObject(jumpRopeKey, jumpRope, 60);
                 //}
 
                 // 心率强度判断
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 b7e203b..65cab11 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+e813d22174a36ed6a56d32c6680c8cbe3560475c")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+3c399871d7a4fff8b5d368263e3942991a974fdd")]
 [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 f1520f6..4aecdd9 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 @@
-297fd43299ec4dd1d6e6586c0f993bcc28ee868403ee350c618e71c5827769a6
+937ead42c43efa52de467b7e6b0b10b17938c2bb3b9c6b465840319e0efb56a9
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 f2917b9..cf0b253 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 bb39e89..37dfbee 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 ae1434e..9101a1c 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 a8d2fa8..396ffe1 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 a8d2fa8..396ffe1 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