diff --git a/alicloud/connectivity/client.go b/alicloud/connectivity/client.go
index 08d69163733..5bbf860a942 100644
--- a/alicloud/connectivity/client.go
+++ b/alicloud/connectivity/client.go
@@ -5669,65 +5669,29 @@ func (client *AliyunClient) NewPaiworkspaceClient() (*roa.Client, error) {
 	}
 	return conn, nil
 }
-
-type ossCredentials struct {
-	client *AliyunClient
-}
-
-func (defCre *ossCredentials) GetAccessKeyID() string {
-	value, err := defCre.client.teaSdkConfig.Credential.GetAccessKeyId()
-	if err == nil && value != nil {
-		return *value
-	}
-	return defCre.client.config.AccessKey
-}
-
-func (defCre *ossCredentials) GetAccessKeySecret() string {
-	value, err := defCre.client.teaSdkConfig.Credential.GetAccessKeySecret()
-	if err == nil && value != nil {
-		return *value
+func (client *AliyunClient) NewVpcipamClient() (*rpc.Client, error) {
+	productCode := "vpcipam"
+	endpoint := ""
+	if v, ok := client.config.Endpoints.Load(productCode); !ok || v.(string) == "" {
+		if err := client.loadEndpoint(productCode); err != nil {
+			endpoint = fmt.Sprintf("vpcipam.%s.aliyuncs.com", client.config.RegionId)
+			client.config.Endpoints.Store(productCode, endpoint)
+			log.Printf("[ERROR] loading %s endpoint got an error: %#v. Using the endpoint %s instead.", productCode, err, endpoint)
+		}
 	}
-	return defCre.client.config.SecretKey
-}
-
-func (defCre *ossCredentials) GetSecurityToken() string {
-	value, err := defCre.client.teaSdkConfig.Credential.GetSecurityToken()
-	if err == nil && value != nil {
-		return *value
+	if v, ok := client.config.Endpoints.Load(productCode); ok && v.(string) != "" {
+		endpoint = v.(string)
 	}
-	return defCre.client.config.SecurityToken
-}
-
-type ossCredentialsProvider struct {
-	client *AliyunClient
-}
-
-func (defBuild *ossCredentialsProvider) GetCredentials() oss.Credentials {
-	return &ossCredentials{client: defBuild.client}
-}
-
-func (client *AliyunClient) GetRetryTimeout(defaultTimeout time.Duration) time.Duration {
-
-	maxRetryTimeout := client.config.MaxRetryTimeout
-	if maxRetryTimeout != 0 {
-		return time.Duration(maxRetryTimeout) * time.Second
+	if endpoint == "" {
+		return nil, fmt.Errorf("[ERROR] missing the product %s endpoint.", productCode)
 	}
-
-	return defaultTimeout
-}
-
-func (client *AliyunClient) GenRoaParam(action, method, version, path string) *openapi.Params {
-	return &openapi.Params{
-		Action:      tea.String(action),
-		Version:     tea.String(version),
-		Protocol:    tea.String(client.config.Protocol),
-		Pathname:    tea.String(path),
-		Method:      tea.String(method),
-		AuthType:    tea.String("AK"),
-		Style:       tea.String("ROA"),
-		ReqBodyType: tea.String("formData"),
-		BodyType:    tea.String("json"),
+	sdkConfig := client.teaSdkConfig
+	sdkConfig.SetEndpoint(endpoint)
+	conn, err := rpc.NewClient(&sdkConfig)
+	if err != nil {
+		return nil, fmt.Errorf("unable to initialize the %s client: %#v", productCode, err)
 	}
+	return conn, nil
 }
 func (client *AliyunClient) NewGwlbClient() (*rpc.Client, error) {
 	productCode := "gwlb"