diff --git a/client.go b/client.go
index 9bf9385..0babd43 100644
--- a/client.go
+++ b/client.go
@@ -1,6 +1,7 @@
 package tdx
 
 import (
+	"encoding/hex"
 	"github.com/injoyai/base/maps/wait/v2"
 	"github.com/injoyai/conv"
 	"github.com/injoyai/ios"
@@ -88,6 +89,7 @@ func (this *Client) Connect() error {
 }
 
 // GetSecurityList 获取市场内指定范围内的所有证券代码
+// 0c02000000011a001a003e05050000000000000002000030303030303101363030303038
 func (this *Client) GetSecurityList() (*protocol.SecurityListResp, error) {
 
 	f := protocol.Frame{
@@ -95,8 +97,14 @@ func (this *Client) GetSecurityList() (*protocol.SecurityListResp, error) {
 		Type:    protocol.Connect,
 		Data:    nil,
 	}
+	_ = f
 
-	_, err := this.Write(f.Bytes())
+	bs, err := hex.DecodeString("0c02000000011a001a003e05050000000000000002000030303030303101363030303038")
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = this.Write(bs)
 	return nil, err
 
 }
diff --git a/example/test/main.go b/example/test/main.go
index 2a0a967..dbcc554 100644
--- a/example/test/main.go
+++ b/example/test/main.go
@@ -3,7 +3,6 @@ package main
 import (
 	"bytes"
 	"encoding/binary"
-	"encoding/hex"
 	"github.com/injoyai/goutil/g"
 	"github.com/injoyai/ios/client"
 	"github.com/injoyai/ios/server"
@@ -27,9 +26,7 @@ func main() {
 		b1cb74001c00000000000d005100bd00789c6378c1cecb252ace6066c5b4898987b9050ed1f90cc5b74c18a5bc18c1b43490fecff09c81819191f13fc3c9f3bb169f5e7dfefeb5ef57f7199a305009308208e5b32bb6bcbf70148712002d7f1e13
 		b1cb74000c02000000003e05ac00ac000102020000303030303031601294121a1c2d4eadabcf0ed412aae5fc01afb0024561124fbcc08301afa47900b2e3174100bf68871a4201b741b6144302bb09af334403972e96354504ac09b619560e00000000f8ff601201363030303038b60fba04060607429788a70efa04ada37ab2531c12974d91e7449dbc354184b6010001844bad324102b5679ea1014203a65abd8d0143048a6ba4dd01440587e101b3d2029613000000000000b60f
 	*/
-	bs, err := hex.DecodeString("0c02000000011a001a003e05050000000000000002000030303030303101363030303038")
-	logs.PanicErr(err)
-	_, err = c.Write(bs)
+	_, err = c.GetSecurityList()
 	logs.PanicErr(err)
 
 	select {}