diff --git a/agent-go/a_init/AgentInitialization.go b/agent-go/a_init/AgentInitialization.go
index 00d5a93..a2ddf7f 100644
--- a/agent-go/a_init/AgentInitialization.go
+++ b/agent-go/a_init/AgentInitialization.go
@@ -250,8 +250,7 @@ func refreshAgentInfoByStatusInfo(agentInfo *a_status.AgentInfo, agentServerInfo
 	// cpu part
 	agentServerInfo.CPUCore = strconv.FormatInt(int64(agentInfo.CPUInfo.NumCores), 10)
 	if len(agentInfo.CPUInfo.CPUInfo) > 0 {
-		marshal, _ := json.Marshal(agentInfo.CPUInfo.CPUInfo[0].ModelName)
-		agentServerInfo.CPUBrand = string(marshal)
+		agentServerInfo.CPUBrand = agentInfo.CPUInfo.CPUInfo[0].ModelName
 	}
 
 	// os info
@@ -289,6 +288,9 @@ func refreshAgentInfoByStatusInfo(agentInfo *a_status.AgentInfo, agentServerInfo
 	agentServerInfo.ServerName = uniformAgentServerName(agentInfo, agentServerInfo)
 	agentServerInfo.MachineID = agentInfo.HostInfo.HostID
 
+	// io test
+	agentServerInfo.IoSpeed = testDiskIO()
+
 	log.DebugF("[refreshAgentInfoByStatusInfo] - ok !")
 }
 
@@ -310,12 +312,16 @@ func uniformAgentServerName(agentInfo *a_status.AgentInfo, agentServerInfo *a_ag
 	if strings.Contains(city, " ") {
 		city = strings.Join(strings.Split(city, " "), "")
 	}
+	// uniform city format
+	agentServerInfo.City = city
+
+	// linux host architecture
 	arch := getMachineType(agentInfo.HostInfo.KernelArch)
 
 	var numS string
 	if agentServerInfo.ServerIPInV4 != "" {
 		split := strings.Split(agentServerInfo.ServerIPInV4, ".")
-		numS = fmt.Sprintf("%03d", split[3])
+		numS = split[3]
 	} else {
 		// Seed the random number generator
 		rand.Seed(time.Now().UnixNano())
@@ -330,6 +336,55 @@ func uniformAgentServerName(agentInfo *a_status.AgentInfo, agentServerInfo *a_ag
 	return city + "-" + arch + "-" + numS
 }
 
+func testDiskIO() string {
+	log.InfoF("testDiskIO - start !")
+
+	// Create a temporary file to test disk I/O
+	f, err := os.CreateTemp("", "test_disk_io")
+	if err != nil {
+		fmt.Println(err)
+		return ""
+	}
+	defer func() {
+		f.Close()
+
+		os.Remove(f.Name())
+	}()
+
+	// Write data to the file
+	data := make([]byte, 10240*10240) // 10MB
+	for i := 0; i < 10; i++ {
+		_, err = f.Write(data)
+		if err != nil {
+			fmt.Println(err)
+			return ""
+		}
+	}
+
+	// Read data from the file
+	startTime := time.Now()
+	buf := make([]byte, 10240*10240) // 10MB
+	for {
+		n, err := f.Read(buf)
+		if err != nil {
+			break
+		}
+		if n == 0 {
+			break
+		}
+	}
+
+	elapsedTime := time.Since(startTime).Seconds()
+
+	// Calculate the disk I/O speed in MB/s
+	speed := float64(len(data)) / (elapsedTime * 10240 * 10240)
+
+	sprintf := fmt.Sprintf("%.2f MB/s", speed)
+
+	log.InfoF("testDiskIO - end io speed are => %s", sprintf)
+	return sprintf
+}
+
 func getMachineType(arch string) string {
 
 	switch {