diff --git a/sdk/client.go b/sdk/client.go
index 47bde20..48d55cc 100644
--- a/sdk/client.go
+++ b/sdk/client.go
@@ -44,6 +44,27 @@ type Client struct {
 	httpProxy      string
 	httpsProxy     string
 	noProxy        string
+
+	header *requests.RefererHeader
+}
+
+func (client *Client) SetRefererHeader(header *requests.RefererHeader) {
+	client.header = header
+}
+
+func (client *Client) getRefererHeader() map[string]string {
+	var header *requests.RefererHeader
+	if client.header == nil {
+		header = &requests.RefererHeader{
+			TraceId: utils.MakeTraceId(),
+		}
+	} else {
+		header = client.header
+	}
+	return map[string]string{
+		"Referer":     header.Referer,
+		"Traceparent": header.TraceId,
+	}
 }
 
 func (client *Client) GetNoProxy() string {
@@ -216,7 +237,7 @@ func (client *Client) DoAction(request requests.AcsRequest, response responses.A
 }
 
 func (client *Client) DoActionWithSigner(request requests.AcsRequest, response responses.AcsResponse, signer auth.Signer) (err error) {
-
+	request.AddHeaders(client.getRefererHeader())
 	httpRequest, err := client.buildRequestWithSigner(request, signer)
 	if err != nil {
 		return err
diff --git a/sdk/requests/request.go b/sdk/requests/request.go
index e6fc33f..740921b 100644
--- a/sdk/requests/request.go
+++ b/sdk/requests/request.go
@@ -55,6 +55,11 @@ type Host struct {
 	Func    func(string, string) string
 }
 
+type RefererHeader struct {
+	Referer string
+	TraceId string
+}
+
 var debug utils.Debug
 
 func init() {
@@ -96,6 +101,7 @@ type AcsRequest interface {
 	GetBodyReader() io.Reader
 
 	AddHeaderParam(key, value string)
+	AddHeaders(headers map[string]string)
 	addQueryParam(key, value string)
 	addFormParam(key, value string)
 	addJsonParam(string, interface{})
@@ -236,6 +242,12 @@ func (request *baseRequest) AddHeaderParam(key, val string) {
 	request.Headers[key] = val
 }
 
+func (request *baseRequest) AddHeaders(headers map[string]string) {
+	for key, val := range headers {
+		request.Headers[key] = val
+	}
+}
+
 func (request *baseRequest) addQueryParam(key, val string) {
 	request.QueryParams[key] = val
 }
diff --git a/sdk/utils/random/str_random.go b/sdk/utils/random/str_random.go
new file mode 100644
index 0000000..e5c3be6
--- /dev/null
+++ b/sdk/utils/random/str_random.go
@@ -0,0 +1,69 @@
+package random
+
+import (
+	"math/rand"
+	"time"
+	"unsafe"
+)
+
+type Mode int // 随机数模式
+
+const (
+	Letter Mode = iota
+	Number
+	LetterNumber
+	LetterHex
+)
+
+const (
+	letters       = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	numbers       = "0123456789"
+	lettersHex    = "0123456789abcdef"
+	letterIdBit   = 6
+	letterIdxMask = 1<<letterIdBit - 1
+	letterIdxMax  = 63 / letterIdBit
+)
+
+func StrRandom(n int64) string {
+	return Random(n, Letter)
+}
+
+func NumRandom(n int64) string {
+	return Random(n, Number)
+}
+
+func Random(n int64, mode ...Mode) string {
+	var baseStr string
+	mode = append(mode, LetterNumber)
+	switch mode[0] {
+	case LetterHex:
+		baseStr = lettersHex
+	case Letter:
+		baseStr = letters
+	case Number:
+		baseStr = numbers
+	case LetterNumber:
+		fallthrough
+	default:
+		baseStr = letters + numbers
+	}
+	return random(n, baseStr)
+}
+
+func random(n int64, baseStr string) string {
+
+	var src = rand.NewSource(time.Now().UnixNano())
+	b := make([]byte, n)
+	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = src.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(baseStr) {
+			b[i] = baseStr[idx]
+			i--
+		}
+		cache >>= letterIdBit
+		remain--
+	}
+	return *(*string)(unsafe.Pointer(&b))
+}
diff --git a/sdk/utils/utils.go b/sdk/utils/utils.go
index c655962..60288fa 100644
--- a/sdk/utils/utils.go
+++ b/sdk/utils/utils.go
@@ -5,8 +5,8 @@ import (
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
+	"golib.gaore.com/GaoreGo/haiwai-common-sdk-go/sdk/utils/random"
 	"hash"
-	rand2 "math/rand"
 	"net/url"
 	"reflect"
 	"sort"
@@ -36,11 +36,7 @@ func NewUUID() UUID {
 }
 
 func RandStringBytes(n int) string {
-	b := make([]byte, n)
-	for i := range b {
-		b[i] = letterBytes[rand2.Intn(len(letterBytes))]
-	}
-	return string(b)
+	return random.StrRandom(int64(n))
 }
 
 func newFromHash(h hash.Hash, ns UUID, name string) UUID {
@@ -109,3 +105,12 @@ func InitStructWithDefaultTag(bean interface{}) {
 		}
 	}
 }
+
+func Md5(data string) string {
+	s := md5.Sum([]byte(data))
+	return hex.EncodeToString(s[:])
+}
+
+func MakeTraceId() string {
+	return fmt.Sprintf("00-%s-%s-01", random.Random(32, random.LetterHex), random.Random(16, random.LetterHex))
+}
diff --git a/services/ip/client.go b/services/ip/client.go
index ca90cec..8506c2d 100644
--- a/services/ip/client.go
+++ b/services/ip/client.go
@@ -11,7 +11,7 @@ const (
 )
 
 var HOST = requests.Host{
-	Default: "ip.gaore.com",
+	Default: "ip.gaore.com.hk",
 	Func: func(s string, area string) string {
 		if area != "" {
 			fmt.Println("ip.gaore.com." + area)