diff --git a/binding/golang/ReadMe.md b/binding/golang/ReadMe.md
index 60f6d7e..434a232 100644
--- a/binding/golang/ReadMe.md
+++ b/binding/golang/ReadMe.md
@@ -2,6 +2,44 @@
 
 # 使用方式
 
+### package 获取
+```bash
+go get github.com/lionsoul2014/ip2region/binding/golang
+```
+
+### API 使用
+```golang
+import (
+	"fmt"
+	"github.com/lionsoul2014/ip2region/binding/golang/xdb"
+    "time"
+)
+
+func main() {
+    var dbPath = "ip2region.xdb file path"
+    searcher, err := xdb.New(dbPath)
+	if err != nil {
+		fmt.Printf("failed to create searcher: %s\n", err.Error())
+        return
+	}
+
+    defer searcher.Close()
+
+    // do the search
+    var ip = "1.2.3.4"
+    var tStart = time.Now()
+    region, err := searcher.SearchByStr(ip)
+    if err != nil {
+        fmt.Printf("failed to SearchIP(%s): %s\n", ip, err)
+        return
+    }
+
+    fmt.Printf("{region: %s, took: %s}\n", region, time.Since(tStart))
+}
+```
+
+# 编译测试程序
+
 # 查询测试
 
 # bench 测试
diff --git a/binding/golang/main.go b/binding/golang/main.go
index f63eb15..fa8649c 100644
--- a/binding/golang/main.go
+++ b/binding/golang/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	"bufio"
 	"fmt"
-	"github.com/lionsoul2014/ip2region/binding/golang/ip2region"
+	"github.com/lionsoul2014/ip2region/binding/golang/xdb"
 	"github.com/mitchellh/go-homedir"
 	"log"
 	"os"
@@ -57,7 +57,7 @@ func testSearch() {
 		return
 	}
 
-	searcher, err := ip2region.New(dbPath)
+	searcher, err := xdb.New(dbPath)
 	if err != nil {
 		log.Fatalf("failed to create searcher: %s", err.Error())
 	}
@@ -84,14 +84,8 @@ func testSearch() {
 			break
 		}
 
-		ip, err := ip2region.CheckIP(line)
-		if err != nil {
-			fmt.Printf("invalid ip address `%s`\n", line)
-			continue
-		}
-
 		tStart := time.Now()
-		region, err := searcher.Search(ip)
+		region, err := searcher.SearchByStr(line)
 		if err != nil {
 			fmt.Printf("\x1b[0;31merr:%s\x1b[0m\n", err.Error())
 		} else {
@@ -141,7 +135,7 @@ func testBench() {
 		return
 	}
 
-	searcher, err := ip2region.New(dbPath)
+	searcher, err := xdb.New(dbPath)
 	defer func() {
 		searcher.Close()
 	}()
@@ -163,13 +157,13 @@ func testBench() {
 			return
 		}
 
-		sip, err := ip2region.CheckIP(ps[0])
+		sip, err := xdb.CheckIP(ps[0])
 		if err != nil {
 			fmt.Printf("check start ip `%s`: %s\n", ps[0], err)
 			return
 		}
 
-		eip, err := ip2region.CheckIP(ps[1])
+		eip, err := xdb.CheckIP(ps[1])
 		if err != nil {
 			fmt.Printf("check end ip `%s`: %s\n", ps[1], err)
 			return
@@ -180,17 +174,17 @@ func testBench() {
 			return
 		}
 
-		mip := ip2region.MidIP(sip, eip)
-		for _, ip := range []uint32{sip, ip2region.MidIP(sip, mip), mip, ip2region.MidIP(mip, eip), eip} {
+		mip := xdb.MidIP(sip, eip)
+		for _, ip := range []uint32{sip, xdb.MidIP(sip, mip), mip, xdb.MidIP(mip, eip), eip} {
 			region, err := searcher.Search(ip)
 			if err != nil {
-				fmt.Printf("failed to search ip '%s': %s\n", ip2region.Long2IP(ip), err)
+				fmt.Printf("failed to search ip '%s': %s\n", xdb.Long2IP(ip), err)
 				return
 			}
 
 			// check the region info
 			if region != ps[2] {
-				fmt.Printf("failed Search(%s) with (%s != %s)\n", ip2region.Long2IP(ip), region, ps[2])
+				fmt.Printf("failed Search(%s) with (%s != %s)\n", xdb.Long2IP(ip), region, ps[2])
 				return
 			}
 
diff --git a/binding/golang/ip2region/index.go b/binding/golang/xdb/index.go
similarity index 99%
rename from binding/golang/ip2region/index.go
rename to binding/golang/xdb/index.go
index bcfcba5..bcc398d 100644
--- a/binding/golang/ip2region/index.go
+++ b/binding/golang/xdb/index.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 
-package ip2region
+package xdb
 
 import (
 	"encoding/binary"
diff --git a/binding/golang/ip2region/searcher.go b/binding/golang/xdb/searcher.go
similarity index 94%
rename from binding/golang/ip2region/searcher.go
rename to binding/golang/xdb/searcher.go
index 626dd2d..b4c334e 100644
--- a/binding/golang/ip2region/searcher.go
+++ b/binding/golang/xdb/searcher.go
@@ -6,7 +6,7 @@
 // ip2region database v2.0 searcher.
 // @Note this is a Not thread safe implementation.
 
-package ip2region
+package xdb
 
 import (
 	"encoding/binary"
@@ -100,7 +100,17 @@ func (s *Searcher) ClearVectorIndex() {
 	s.vectorIndex = nil
 }
 
-// Search find the region for the specified ip address
+// SearchByStr find the region for the specified ip string
+func (s *Searcher) SearchByStr(str string) (string, error) {
+	ip, err := CheckIP(str)
+	if err != nil {
+		return "", err
+	}
+
+	return s.Search(ip)
+}
+
+// Search find the region for the specified long ip
 func (s *Searcher) Search(ip uint32) (string, error) {
 	// locate the segment index block based on the vector index
 	var vIndex *VectorIndexBlock
diff --git a/binding/golang/ip2region/searcher_test.go b/binding/golang/xdb/searcher_test.go
similarity index 93%
rename from binding/golang/ip2region/searcher_test.go
rename to binding/golang/xdb/searcher_test.go
index e021c3e..67d234e 100644
--- a/binding/golang/ip2region/searcher_test.go
+++ b/binding/golang/xdb/searcher_test.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 
-package ip2region
+package xdb
 
 import (
 	"fmt"
diff --git a/binding/golang/ip2region/util.go b/binding/golang/xdb/util.go
similarity index 98%
rename from binding/golang/ip2region/util.go
rename to binding/golang/xdb/util.go
index a015a3d..1a53af5 100644
--- a/binding/golang/ip2region/util.go
+++ b/binding/golang/xdb/util.go
@@ -1,4 +1,4 @@
-package ip2region
+package xdb
 
 import (
 	"encoding/binary"