diff --git a/cmd/update.go b/cmd/update.go
index 4912f1b..562b139 100644
--- a/cmd/update.go
+++ b/cmd/update.go
@@ -21,7 +21,7 @@ var updateCmd = &cobra.Command{
 		filePath := filepath.Join(constant.HomePath, "qqwry.dat")
 
 		log.Println("正在下载最新纯真 IP 库...")
-		tmpData, err := qqwry.Download()
+		tmpData, err := qqwry.Download(filePath)
 		if err != nil {
 			log.Fatalln("下载失败", err.Error())
 			return
diff --git a/pkg/common/struct.go b/pkg/common/struct.go
index f8d6600..735d189 100644
--- a/pkg/common/struct.go
+++ b/pkg/common/struct.go
@@ -11,10 +11,9 @@ type FileData struct {
 
 // IPDB common ip database
 type IPDB struct {
-	Data     *FileData
-	Offset   uint32
-	IndexLen uint32
-	IPNum    uint32
+	Data   *FileData
+	Offset uint32
+	IPNum  uint32
 }
 
 // setOffset 设置偏移量
@@ -82,7 +81,7 @@ func (db *IPDB) ReadArea(offset uint32) []byte {
 	return db.ReadString(offset)
 }
 
-func (db *IPDB) GetMiddleOffset(start uint32, end uint32) uint32 {
-	records := ((end - start) / db.IndexLen) >> 1
-	return start + records*db.IndexLen
+func GetMiddleOffset(start uint32, end uint32, indexLen uint32) uint32 {
+	records := ((end - start) / indexLen) >> 1
+	return start + records*indexLen
 }
diff --git a/pkg/qqwry/qqwry.go b/pkg/qqwry/qqwry.go
index 22994cb..68b7478 100644
--- a/pkg/qqwry/qqwry.go
+++ b/pkg/qqwry/qqwry.go
@@ -51,9 +51,8 @@ func NewQQwry(filePath string) QQwry {
 
 	return QQwry{
 		IPDB: common.IPDB{
-			Data:     &fileInfo,
-			IndexLen: 7,
-			IPNum:    (end-start)/7 + 1,
+			Data:  &fileInfo,
+			IPNum: (end-start)/7 + 1,
 		},
 	}
 }
@@ -117,18 +116,18 @@ func (db *QQwry) searchIndex(ip uint32) uint32 {
 	start := binary.LittleEndian.Uint32(header[:4])
 	end := binary.LittleEndian.Uint32(header[4:])
 
-	buf := make([]byte, db.IndexLen)
+	buf := make([]byte, 7)
 	mid := uint32(0)
 	_ip := uint32(0)
 
 	for {
-		mid = db.GetMiddleOffset(start, end)
-		buf = db.ReadData(db.IndexLen, mid)
+		mid = common.GetMiddleOffset(start, end, 7)
+		buf = db.ReadData(7, mid)
 		_ip = binary.LittleEndian.Uint32(buf[:4])
 
-		if end-start == db.IndexLen {
+		if end-start == 7 {
 			offset := common.ByteToUInt32(buf[4:])
-			buf = db.ReadData(db.IndexLen)
+			buf = db.ReadData(7)
 			if ip < binary.LittleEndian.Uint32(buf[:4]) {
 				return offset
 			}
diff --git a/pkg/zxipv6wry/zxipv6wry.go b/pkg/zxipv6wry/zxipv6wry.go
index a7eb94b..26464c5 100644
--- a/pkg/zxipv6wry/zxipv6wry.go
+++ b/pkg/zxipv6wry/zxipv6wry.go
@@ -53,15 +53,12 @@ func NewZXwry(filePath string) ZXwry {
 
 	return ZXwry{
 		IPDB: common.IPDB{
-			Data:     &fileInfo,
-			IndexLen: 11,
+			Data: &fileInfo,
 		},
 	}
 }
 
 func (db ZXwry) Find(ip string) (result string) {
-	db.Offset = 0
-
 	tp := big.NewInt(0)
 	op := big.NewInt(0)
 	tp.SetBytes(net.ParseIP(ip).To16())
@@ -101,16 +98,16 @@ func (db *ZXwry) searchIndex(ip uint64) uint32 {
 	header := db.ReadData(16, 8)
 	start := binary.LittleEndian.Uint32(header[8:])
 	counts := binary.LittleEndian.Uint32(header[:8])
-	end := start + counts*db.IndexLen
+	end := start + counts*11
 
-	buf := make([]byte, db.IndexLen)
+	buf := make([]byte, 11)
 
 	for {
-		mid := db.GetMiddleOffset(start, end)
+		mid := common.GetMiddleOffset(start, end, 11)
 		buf = db.ReadData(11, mid)
 		ipBytes := binary.LittleEndian.Uint64(buf[:8])
 
-		if end-start == db.IndexLen {
+		if end-start == 11 {
 			if ip >= binary.LittleEndian.Uint64(db.ReadData(8, end)) {
 				buf = db.ReadData(11, end)
 			}