diff --git a/main.cpp b/main.cpp
index c29e0f5..3c50fa6 100644
--- a/main.cpp
+++ b/main.cpp
@@ -309,12 +309,17 @@ void SingleModeMain()
 
 bool EnterSingleMode()
 {
-    printf("按下任何按键来中断常规启动. 3秒后将进入自动模式.\n");
+    int lastval=-1;
     int interval=50;/// ms
     int looptime=3000/interval;
 
     for(int i=0;i<looptime;i++)
     {
+        if((looptime-i)*interval/1000!=lastval)
+        {
+            lastval=(looptime-i)*interval/1000;
+            printf("按下任何按键来中断常规启动. %d秒后将进入自动模式.\n",lastval);
+        }
         if(kbhit())
         {
             SingleModeMain();