diff --git a/client.go b/client.go
index a4adfec..46d2d94 100644
--- a/client.go
+++ b/client.go
@@ -77,7 +77,7 @@ func (c *Client) do(req *http.Request) (*http.Response, error) {
 	}
 	resp, err := c.Client.Do(req)
 	if err != nil {
-		err = NetworkErr{error: err}
+		err = ErrorWrapper(NetworkErr, err.Error())
 	}
 	for _, hook := range c.HttpHooks {
 		hook.AfterRequest(resp, err)
diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..a004358
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,33 @@
+package openwechat
+
+import (
+	"errors"
+)
+
+type errorWrapper struct {
+	err error
+	msg string
+}
+
+func (e errorWrapper) Unwrap() error { return e.err }
+
+func (e errorWrapper) Error() string { return e.msg }
+
+func ErrorWrapper(err error, msg string) error {
+	return &errorWrapper{msg: msg, err: err}
+}
+
+var NetworkErr = errors.New("wechat network error")
+
+func IsNetworkError(err error) bool {
+	return errors.Is(err, NetworkErr)
+}
+
+// IgnoreNetworkError 忽略网络请求的错误
+func IgnoreNetworkError(errHandler func(err error)) func(error) {
+	return func(err error) {
+		if !IsNetworkError(err) {
+			errHandler(err)
+		}
+	}
+}
diff --git a/errors_test.go b/errors_test.go
new file mode 100644
index 0000000..cd4e2f6
--- /dev/null
+++ b/errors_test.go
@@ -0,0 +1,14 @@
+package openwechat
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestIsNetworkError(t *testing.T) {
+	var err = errors.New("test error")
+	err = ErrorWrapper(NetworkErr, err.Error())
+	if !IsNetworkError(err) {
+		t.Error("err is not network error")
+	}
+}
diff --git a/items.go b/items.go
index 4f005ec..a5c8ce8 100644
--- a/items.go
+++ b/items.go
@@ -161,23 +161,3 @@ type PushLoginResponse struct {
 func (p PushLoginResponse) Ok() bool {
 	return p.Ret == "0" && p.UUID != ""
 }
-
-type NetworkErr struct{ error }
-
-func (n NetworkErr) Unwrap() error {
-	return n.error
-}
-
-func IsNetworkError(err error) bool {
-	_, ok := err.(NetworkErr)
-	return ok
-}
-
-// IgnoreNetworkError 忽略网络请求的错误
-func IgnoreNetworkError(errHandler func(err error)) func(error) {
-	return func(err error) {
-		if !IsNetworkError(err) {
-			errHandler(err)
-		}
-	}
-}