diff --git a/.example/other/test.go b/.example/other/test.go
index d1c90d218..790580777 100644
--- a/.example/other/test.go
+++ b/.example/other/test.go
@@ -1,19 +1,5 @@
 package main
 
-import "fmt"
-
-// apiString is the type assert api for String.
-type apiString interface {
-	String() string
-}
-
 func main() {
-	for i := 0; i < 10; i++ {
-		switch 1 {
-		case 1:
-			continue
-		}
-		fmt.Println(i)
-	}
 
 }
diff --git a/net/ghttp/ghttp_client_chain.go b/net/ghttp/ghttp_client_chain.go
index 55671bf83..9191d67bf 100644
--- a/net/ghttp/ghttp_client_chain.go
+++ b/net/ghttp/ghttp_client_chain.go
@@ -124,3 +124,14 @@ func (c *Client) Ctx(ctx context.Context) *Client {
 	newClient.SetCtx(ctx)
 	return newClient
 }
+
+// Retry is a chaining function,
+// which sets retry count and interval when failure for next request.
+func (c *Client) Retry(retryCount int, retryInterval time.Duration) *Client {
+	newClient := c
+	if c.parent == nil {
+		newClient = c.Clone()
+	}
+	newClient.SetRetry(retryCount, retryInterval)
+	return c
+}
diff --git a/net/ghttp/ghttp_client_config.go b/net/ghttp/ghttp_client_config.go
index d650b7f19..ac068a38a 100644
--- a/net/ghttp/ghttp_client_config.go
+++ b/net/ghttp/ghttp_client_config.go
@@ -28,7 +28,7 @@ type Client struct {
 	authPass      string            // HTTP basic authentication: pass.
 	browserMode   bool              // Whether auto saving and sending cookie content.
 	retryCount    int               // Retry count when request fails.
-	retryInterval int               // Retry interval when request fails.
+	retryInterval time.Duration     // Retry interval when request fails.
 }
 
 // NewClient creates and returns a new HTTP client object.
@@ -143,7 +143,7 @@ func (c *Client) SetCtx(ctx context.Context) *Client {
 }
 
 // SetRetry sets retry count and interval.
-func (c *Client) SetRetry(retryCount int, retryInterval int) *Client {
+func (c *Client) SetRetry(retryCount int, retryInterval time.Duration) *Client {
 	c.retryCount = retryCount
 	c.retryInterval = retryInterval
 	return c
diff --git a/net/ghttp/ghttp_client_request.go b/net/ghttp/ghttp_client_request.go
index f3f793ff2..4dadf9880 100644
--- a/net/ghttp/ghttp_client_request.go
+++ b/net/ghttp/ghttp_client_request.go
@@ -190,7 +190,7 @@ func (c *Client) DoRequest(method, url string, data ...interface{}) (resp *Clien
 		}
 	}
 	// It's necessary set the req.Host if you want to custom the host value of the request.
-	// It uses the "Host" value of the header.
+	// It uses the "Host" value from header if it's not set in the request.
 	if host := req.Header.Get("Host"); host != "" && req.Host == "" {
 		req.Host = host
 	}
@@ -217,6 +217,7 @@ func (c *Client) DoRequest(method, url string, data ...interface{}) (resp *Clien
 		if r, err = c.Do(req); err != nil {
 			if c.retryCount > 0 {
 				c.retryCount--
+				time.Sleep(c.retryInterval)
 			} else {
 				return nil, err
 			}