diff --git a/netutil/net_example_test.go b/netutil/net_example_test.go
index 162c2ed..eea03bb 100644
--- a/netutil/net_example_test.go
+++ b/netutil/net_example_test.go
@@ -180,7 +180,7 @@ func ExampleConvertMapToQueryString() {
 }
 
 func ExampleIsPingConnected() {
-	result1 := IsPingConnected("cn.bing.com")
+	result1 := IsPingConnected("bing.com")
 	result2 := IsPingConnected("www.!@#&&&.com")
 
 	fmt.Println(result1)
@@ -192,7 +192,7 @@ func ExampleIsPingConnected() {
 }
 
 func ExampleIsTelnetConnected() {
-	result1 := IsTelnetConnected("cn.bing.com", "80")
+	result1 := IsTelnetConnected("bing.com", "80")
 	result2 := IsTelnetConnected("www.baidu.com", "123")
 
 	fmt.Println(result1)
diff --git a/netutil/net_test.go b/netutil/net_test.go
index 008c51a..5435971 100644
--- a/netutil/net_test.go
+++ b/netutil/net_test.go
@@ -120,7 +120,7 @@ func TestEncodeUrl(t *testing.T) {
 func TestIsPingConnected(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsPingConnected")
 
-	result1 := IsPingConnected("cn.bing.com")
+	result1 := IsPingConnected("bing.com")
 	assert.Equal(true, result1)
 
 	result2 := IsPingConnected("www.!@#&&&.com")
@@ -130,7 +130,7 @@ func TestIsPingConnected(t *testing.T) {
 func TestTelnetConnected(t *testing.T) {
 	assert := internal.NewAssert(t, "TestTelnetConnected")
 
-	result1 := IsTelnetConnected("cn.bing.com", "80")
+	result1 := IsTelnetConnected("bing.com", "80")
 	assert.Equal(true, result1)
 
 	result2 := IsTelnetConnected("www.baidu.com", "123")