diff --git a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
index 966e872..7facd7e 100644
--- a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
@@ -139,7 +139,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
                         Photo = x.Photo ?? ""
                     }).ToListAsync();
 
-                _caching.AddObject(studentListKey, studentList, 28800); // 缓存 8 小时
+                _caching.AddObject(studentListKey, studentList, 60); // 缓存 8 小时
             }
 
             int warmUp = 0, low = 0, medium = 0, high = 0, warning = 0;