diff --git a/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/README.md b/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/README.md
index 4741db84ab974fd90ab5114558043ad9ea4f4d49..81cc6c7d78b8935002cb1275c94b31dc956252ab 100644
--- a/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/README.md
+++ b/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/README.md
@@ -52,9 +52,9 @@ static void Example_Task(void)
     while (1) 
     {
         osEventFlagsWait(evt_id, FLAGS_MSK1, osFlagsWaitAny, osWaitForever);
-        Beep_StatusSet(ON);
-        osDelay(300);
         Beep_StatusSet(OFF);
+        osDelay(300);
+        Beep_StatusSet(ON);
 
     }
 }
diff --git a/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/e53_is1_example.c b/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/e53_is1_example.c
index 173313bf6d429f78f9e2affcb36b3d7804249ffd..f26c349360f547a81c31ab45d11511eba7757ead 100644
--- a/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/e53_is1_example.c
+++ b/applications/BearPi/BearPi-HM_Nano/sample/C5_e53_is1_infrared/e53_is1_example.c
@@ -40,9 +40,9 @@ static void Example_Task(void)
     while (1)
     {
         osEventFlagsWait(evt_id, FLAGS_MSK1, osFlagsWaitAny, osWaitForever);
-        Beep_StatusSet(ON);
-        osDelay(300);
         Beep_StatusSet(OFF);
+        osDelay(300);
+        Beep_StatusSet(ON);
     }
 }