diff --git a/maker/golang/xdb/util.go b/maker/golang/xdb/util.go
index 96debc8..45b7427 100644
--- a/maker/golang/xdb/util.go
+++ b/maker/golang/xdb/util.go
@@ -5,7 +5,6 @@
 package xdb
 
 import (
-	"encoding/binary"
 	"fmt"
 	"strconv"
 	"strings"
@@ -19,7 +18,7 @@ func CheckIP(ip string) (uint32, error) {
 		return 0, fmt.Errorf("invalid ip address `%s`", ip)
 	}
 
-	var buff = make([]byte, 4)
+	var val uint32
 	for i, s := range ps {
 		d, err := strconv.Atoi(s)
 		if err != nil {
@@ -30,21 +29,16 @@ func CheckIP(ip string) (uint32, error) {
 			return 0, fmt.Errorf("the %dth part `%s` should be an integer bettween 0 and 255", i, s)
 		}
 
-		buff[i] = byte(d)
+		val |= uint32(d) << ((3 - i) * 8)
 	}
 
 	// convert the ip to integer
 
-	return binary.BigEndian.Uint32(buff), nil
+	return val, nil
 }
 
 func Long2IP(ip uint32) string {
-	var buff = make([]string, 4)
-	buff[0] = fmt.Sprintf("%d", (ip>>24)&0xFF)
-	buff[1] = fmt.Sprintf("%d", (ip>>16)&0xFF)
-	buff[2] = fmt.Sprintf("%d", (ip>>8)&0xFF)
-	buff[3] = fmt.Sprintf("%d", (ip>>0)&0xFF)
-	return strings.Join(buff, ".")
+	return fmt.Sprintf("%d.%d.%d.%d", (ip>>24)&0xFF, (ip>>16)&0xFF, (ip>>8)&0xFF, (ip>>0)&0xFF)
 }
 
 func MidIP(sip uint32, eip uint32) uint32 {
diff --git a/maker/golang/xdb/util_test.go b/maker/golang/xdb/util_test.go
index 0de34dc..d162a12 100644
--- a/maker/golang/xdb/util_test.go
+++ b/maker/golang/xdb/util_test.go
@@ -5,10 +5,37 @@
 package xdb
 
 import (
+	"encoding/binary"
 	"fmt"
+	"net"
 	"testing"
 )
 
+func TestCheckIP(t *testing.T) {
+	var str = "29.34.191.255"
+	ip, err := CheckIP(str)
+	if err != nil {
+		t.Errorf("check ip `%s`: %s\n", str, err)
+	}
+	netip := net.ParseIP(str).To4()
+	if netip == nil {
+		t.Fatalf("parse ip `%s` failed", str)
+	}
+	u32 := binary.BigEndian.Uint32(netip)
+	fmt.Printf("checkip: %d, parseip: %d, isequal: %v", ip, u32, ip == u32)
+}
+
+func TestLong2IP(t *testing.T) {
+	var str = "29.34.191.255"
+	netip := net.ParseIP(str).To4()
+	if netip == nil {
+		t.Fatalf("parse ip `%s` failed", str)
+	}
+	u32 := binary.BigEndian.Uint32(netip)
+	ipstr := Long2IP(u32)
+	fmt.Printf("originIP: %s, Long2IP: %s, isequal: %v", str, ipstr, ipstr == str)
+}
+
 func TestSplitSegment(t *testing.T) {
 	// var str = "1.1.0.0|1.3.3.24|中国|广东|深圳|电信"
 	// var str = "0.0.0.0|1.255.225.254|0|0|0|内网IP|内网IP"