diff --git a/alidns/AddDomain.go b/alidns/AddDomain.go
index 2383865..7b589b2 100644
--- a/alidns/AddDomain.go
+++ b/alidns/AddDomain.go
@@ -9,7 +9,7 @@ import (
 type AddDomainArgs struct {
 	DomainName string
 
-	//optional
+	// optional
 	GroupId string
 }
 
diff --git a/alidns/AddDomainRecord.go b/alidns/AddDomainRecord.go
index 92c8e17..4cdefd2 100644
--- a/alidns/AddDomainRecord.go
+++ b/alidns/AddDomainRecord.go
@@ -13,7 +13,7 @@ type AddDomainRecordArgs struct {
 	Type       string
 	Value      string
 
-	//optional
+	// optional
 	TTL  json.Number
 	Line string
 }
diff --git a/alidns/DeleteSubDomainRecords.go b/alidns/DeleteSubDomainRecords.go
index 4ff4c05..9d22a5a 100644
--- a/alidns/DeleteSubDomainRecords.go
+++ b/alidns/DeleteSubDomainRecords.go
@@ -6,7 +6,7 @@ type DeleteSubDomainRecordsArgs struct {
 	DomainName string
 	RR         string
 
-	//optional
+	// optional
 	Type string
 }
 
diff --git a/alidns/DescribeDomainGroups.go b/alidns/DescribeDomainGroups.go
index 797b354..62852e9 100644
--- a/alidns/DescribeDomainGroups.go
+++ b/alidns/DescribeDomainGroups.go
@@ -12,7 +12,7 @@ type DomainGroupType struct {
 }
 
 type DescribeDomainGroupsArgs struct {
-	//optional
+	// optional
 	common.Pagination
 	KeyWord string
 }
@@ -32,7 +32,6 @@ func (client *Client) DescribeDomainGroups(args *DescribeDomainGroupsArgs) (grou
 	action := "DescribeDomainGroups"
 	response := &DescribeDomainGroupsResponse{}
 	err = client.Invoke(action, args, response)
-
 	if err != nil {
 		log.Printf("%s error, %v", action, err)
 		return nil, err
diff --git a/alidns/DescribeDomainInfo.go b/alidns/DescribeDomainInfo.go
index b88cd91..5945031 100644
--- a/alidns/DescribeDomainInfo.go
+++ b/alidns/DescribeDomainInfo.go
@@ -36,7 +36,6 @@ func (client *Client) DescribeDomainInfo(args *DescribeDomainInfoArgs) (domain D
 	action := "DescribeDomainInfo"
 	response := &DescribeDomainInfoResponse{}
 	err = client.Invoke(action, args, response)
-
 	if err != nil {
 		log.Printf("%s error, %v", action, err)
 		return DomainType{}, err
diff --git a/alidns/DescribeDomainRecords.go b/alidns/DescribeDomainRecords.go
index 81c97db..a95e538 100644
--- a/alidns/DescribeDomainRecords.go
+++ b/alidns/DescribeDomainRecords.go
@@ -5,7 +5,7 @@ import "github.com/denverdino/aliyungo/common"
 type DescribeDomainRecordsArgs struct {
 	DomainName string
 
-	//optional
+	// optional
 	common.Pagination
 	RRKeyWord    string
 	TypeKeyWord  string
diff --git a/alidns/DescribeDomainRecordsNew.go b/alidns/DescribeDomainRecordsNew.go
index f2f04d3..0d31cac 100644
--- a/alidns/DescribeDomainRecordsNew.go
+++ b/alidns/DescribeDomainRecordsNew.go
@@ -5,7 +5,7 @@ import "github.com/denverdino/aliyungo/common"
 type DescribeDomainRecordsNewArgs struct {
 	DomainName string
 
-	//optional
+	// optional
 	common.Pagination
 	RRKeyWord    string
 	TypeKeyWord  string
diff --git a/alidns/DescribeDomains.go b/alidns/DescribeDomains.go
index 41e1232..8032eae 100644
--- a/alidns/DescribeDomains.go
+++ b/alidns/DescribeDomains.go
@@ -28,7 +28,6 @@ func (client *Client) DescribeDomains(args *DescribeDomainsArgs) (domains []Doma
 	action := "DescribeDomains"
 	response := &DescribeDomainsResponse{}
 	err = client.Invoke(action, args, response)
-
 	if err != nil {
 		log.Printf("%s error, %v", action, err)
 		return nil, err
diff --git a/alidns/DescribeSubDomainRecords.go b/alidns/DescribeSubDomainRecords.go
index 86a8e4d..cc46728 100644
--- a/alidns/DescribeSubDomainRecords.go
+++ b/alidns/DescribeSubDomainRecords.go
@@ -5,7 +5,7 @@ import "github.com/denverdino/aliyungo/common"
 type DescribeSubDomainRecordsArgs struct {
 	SubDomain string
 
-	//optional
+	// optional
 	PageNumber int32
 	PageSize   int32
 	Type       string
diff --git a/alidns/UpdateDomainRecord.go b/alidns/UpdateDomainRecord.go
index 4d40100..51fb53d 100644
--- a/alidns/UpdateDomainRecord.go
+++ b/alidns/UpdateDomainRecord.go
@@ -12,7 +12,7 @@ type UpdateDomainRecordArgs struct {
 	Type     string
 	Value    string
 
-	//optional
+	// optional
 	TTL      json.Number
 	Priority json.Number
 	Line     string
diff --git a/main.go b/main.go
index 2971a27..0fd4fef 100644
--- a/main.go
+++ b/main.go
@@ -15,11 +15,12 @@ import (
 	"time"
 
 	"github.com/denverdino/aliyungo/common"
-	dns "github.com/honwen/aliyun-ddns-cli/alidns"
 	"github.com/honwen/golibs/cip"
 	"github.com/honwen/golibs/domain"
 	"github.com/honwen/ip2loc"
 	"github.com/urfave/cli"
+
+	dns "github.com/honwen/aliyun-ddns-cli/alidns"
 )
 
 const RR_AT = `@`
diff --git a/utils_test.go b/utils_test.go
index 0bf68bc..e36541c 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -67,6 +67,7 @@ func TestSplitDomain005(t *testing.T) {
 	got.T(t).Eq(rr, "*.b.a")
 	got.T(t).Eq(domain, "example.com")
 }
+
 func TestSplitDomain006(t *testing.T) {
 	rr, domain := domain.SplitDomainToRR("a.example.co.kr")