diff --git a/work/addresslist/department.go b/work/addresslist/department.go
index 79a7e46..cf23946 100644
--- a/work/addresslist/department.go
+++ b/work/addresslist/department.go
@@ -7,8 +7,8 @@ import (
 )
 
 const (
-	// DepartmentSimpleListURL 获取子部门ID列表
-	DepartmentSimpleListURL = "https://qyapi.weixin.qq.com/cgi-bin/department/simplelist?access_token=%s&id=%d"
+	// departmentSimpleListURL 获取子部门ID列表
+	departmentSimpleListURL = "https://qyapi.weixin.qq.com/cgi-bin/department/simplelist?access_token=%s&id=%d"
 )
 
 type (
@@ -36,7 +36,7 @@ func (r *Client) DepartmentSimpleList(departmentID int) ([]*DepartmentID, error)
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.HTTPGet(fmt.Sprintf(DepartmentSimpleListURL, accessToken, departmentID)); err != nil {
+	if response, err = util.HTTPGet(fmt.Sprintf(departmentSimpleListURL, accessToken, departmentID)); err != nil {
 		return nil, err
 	}
 	result := &DepartmentSimpleListResponse{}
diff --git a/work/addresslist/user.go b/work/addresslist/user.go
index 33e9fa1..4b6a88c 100644
--- a/work/addresslist/user.go
+++ b/work/addresslist/user.go
@@ -7,12 +7,12 @@ import (
 )
 
 const (
-	// UserSimpleListURL 获取部门成员
-	UserSimpleListURL = "https://qyapi.weixin.qq.com/cgi-bin/user/simplelist?access_token=%s&department_id=%d"
-	// UserGetURL 读取成员
-	UserGetURL = "https://qyapi.weixin.qq.com/cgi-bin/user/get?access_token=%s&userid=%s"
-	// UserListIDURL 获取成员ID列表
-	UserListIDURL = "https://qyapi.weixin.qq.com/cgi-bin/user/list_id?access_token=%s"
+	// userSimpleListURL 获取部门成员
+	userSimpleListURL = "https://qyapi.weixin.qq.com/cgi-bin/user/simplelist?access_token=%s&department_id=%d"
+	// userGetURL 读取成员
+	userGetURL = "https://qyapi.weixin.qq.com/cgi-bin/user/get?access_token=%s&userid=%s"
+	// userListIDURL 获取成员ID列表
+	userListIDURL = "https://qyapi.weixin.qq.com/cgi-bin/user/list_id?access_token=%s"
 )
 
 type (
@@ -41,7 +41,7 @@ func (r *Client) UserSimpleList(departmentID int) ([]*UserList, error) {
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.HTTPGet(fmt.Sprintf(UserSimpleListURL, accessToken, departmentID)); err != nil {
+	if response, err = util.HTTPGet(fmt.Sprintf(userSimpleListURL, accessToken, departmentID)); err != nil {
 		return nil, err
 	}
 	result := &UserSimpleListResponse{}
@@ -125,7 +125,7 @@ func (r *Client) UserGet(UserID string) (*UserGetResponse, error) {
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.HTTPGet(fmt.Sprintf(UserGetURL, accessToken, UserID)); err != nil {
+	if response, err = util.HTTPGet(fmt.Sprintf(userGetURL, accessToken, UserID)); err != nil {
 		return nil, err
 	}
 	result := &UserGetResponse{}
@@ -166,7 +166,7 @@ func (r *Client) UserListID(req *UserListIDRequest) (*UserListIDResponse, error)
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(UserListIDURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(userListIDURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &UserListIDResponse{}
diff --git a/work/externalcontact/contact_way.go b/work/externalcontact/contact_way.go
index 5afdc19..150f05b 100644
--- a/work/externalcontact/contact_way.go
+++ b/work/externalcontact/contact_way.go
@@ -7,16 +7,16 @@ import (
 )
 
 const (
-	// AddContactWayURL 配置客户联系「联系我」方式
-	AddContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_contact_way?access_token=%s"
-	// GetContactWayURL 获取企业已配置的「联系我」方式
-	GetContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_contact_way?access_token=%s"
-	// UpdateContactWayURL 更新企业已配置的「联系我」方式
-	UpdateContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/update_contact_way?access_token=%s"
-	// ListContactWayURL 获取企业已配置的「联系我」列表
-	ListContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/list_contact_way?access_token=%s"
-	// DelContactWayURL 删除企业已配置的「联系我」方式
-	DelContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/del_contact_way?access_token=%s"
+	// addContactWayURL 配置客户联系「联系我」方式
+	addContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_contact_way?access_token=%s"
+	// getContactWayURL 获取企业已配置的「联系我」方式
+	getContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_contact_way?access_token=%s"
+	// updateContactWayURL 更新企业已配置的「联系我」方式
+	updateContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/update_contact_way?access_token=%s"
+	// listContactWayURL 获取企业已配置的「联系我」列表
+	listContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/list_contact_way?access_token=%s"
+	// delContactWayURL 删除企业已配置的「联系我」方式
+	delContactWayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/del_contact_way?access_token=%s"
 )
 
 type (
@@ -98,7 +98,7 @@ func (r *Client) AddContactWay(req *AddContactWayRequest) (*AddContactWayRespons
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(AddContactWayURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(addContactWayURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &AddContactWayResponse{}
@@ -149,7 +149,7 @@ func (r *Client) GetContactWay(req *GetContactWayRequest) (*GetContactWayRespons
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(GetContactWayURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(getContactWayURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &GetContactWayResponse{}
@@ -191,7 +191,7 @@ func (r *Client) UpdateContactWay(req *UpdateContactWayRequest) (*UpdateContactW
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(UpdateContactWayURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(updateContactWayURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &UpdateContactWayResponse{}
@@ -232,7 +232,7 @@ func (r *Client) ListContactWay(req *ListContactWayRequest) (*ListContactWayResp
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(ListContactWayURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(listContactWayURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &ListContactWayResponse{}
@@ -264,7 +264,7 @@ func (r *Client) DelContactWay(req *DelContactWayRequest) (*DelContactWayRespons
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(DelContactWayURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(delContactWayURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &DelContactWayResponse{}
diff --git a/work/externalcontact/external_user.go b/work/externalcontact/external_user.go
index b8d8f9c..3dd2e9e 100644
--- a/work/externalcontact/external_user.go
+++ b/work/externalcontact/external_user.go
@@ -8,14 +8,14 @@ import (
 )
 
 const (
-	// FetchExternalContactUserListURL 获取客户列表
-	FetchExternalContactUserListURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/list"
-	// FetchExternalContactUserDetailURL 获取客户详情
-	FetchExternalContactUserDetailURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get"
-	// FetchBatchExternalContactUserDetailURL 批量获取客户详情
-	FetchBatchExternalContactUserDetailURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/batch/get_by_user"
-	// UpdateUserRemarkURL 更新客户备注信息
-	UpdateUserRemarkURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/remark"
+	// fetchExternalContactUserListURL 获取客户列表
+	fetchExternalContactUserListURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/list"
+	// fetchExternalContactUserDetailURL 获取客户详情
+	fetchExternalContactUserDetailURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get"
+	// fetchBatchExternalContactUserDetailURL 批量获取客户详情
+	fetchBatchExternalContactUserDetailURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/batch/get_by_user"
+	// updateUserRemarkURL 更新客户备注信息
+	updateUserRemarkURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/remark"
 )
 
 // ExternalUserListResponse 外部联系人列表响应
@@ -32,7 +32,7 @@ func (r *Client) GetExternalUserList(userID string) ([]string, error) {
 		return nil, err
 	}
 	var response []byte
-	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%v&userid=%v", FetchExternalContactUserListURL, accessToken, userID))
+	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%v&userid=%v", fetchExternalContactUserListURL, accessToken, userID))
 	if err != nil {
 		return nil, err
 	}
@@ -107,7 +107,7 @@ func (r *Client) GetExternalUserDetail(externalUserID string, nextCursor ...stri
 	if len(nextCursor) > 0 {
 		cursor = nextCursor[0]
 	}
-	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%v&external_userid=%v&cursor=%v", FetchExternalContactUserDetailURL, accessToken, externalUserID, cursor))
+	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%v&external_userid=%v&cursor=%v", fetchExternalContactUserDetailURL, accessToken, externalUserID, cursor))
 	if err != nil {
 		return nil, err
 	}
@@ -178,7 +178,7 @@ func (r *Client) BatchGetExternalUserDetails(request BatchGetExternalUserDetails
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", FetchBatchExternalContactUserDetailURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", fetchBatchExternalContactUserDetailURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
@@ -213,7 +213,7 @@ func (r *Client) UpdateUserRemark(request UpdateUserRemarkRequest) error {
 	if err != nil {
 		return err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", UpdateUserRemarkURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", updateUserRemarkURL, accessToken), string(jsonData))
 	if err != nil {
 		return err
 	}
diff --git a/work/externalcontact/follow_user.go b/work/externalcontact/follow_user.go
index 1cfc361..67469b8 100644
--- a/work/externalcontact/follow_user.go
+++ b/work/externalcontact/follow_user.go
@@ -7,8 +7,8 @@ import (
 )
 
 const (
-	// FetchFollowUserListURL 获取配置了客户联系功能的成员列表
-	FetchFollowUserListURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_follow_user_list"
+	// fetchFollowUserListURL 获取配置了客户联系功能的成员列表
+	fetchFollowUserListURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_follow_user_list"
 )
 
 // followerUserResponse 客户联系功能的成员列表响应
@@ -25,7 +25,7 @@ func (r *Client) GetFollowUserList() ([]string, error) {
 		return nil, err
 	}
 	var response []byte
-	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%s", FetchFollowUserListURL, accessToken))
+	response, err = util.HTTPGet(fmt.Sprintf("%s?access_token=%s", fetchFollowUserListURL, accessToken))
 	if err != nil {
 		return nil, err
 	}
diff --git a/work/externalcontact/groupchat.go b/work/externalcontact/groupchat.go
index 0aa9ccd..e098530 100644
--- a/work/externalcontact/groupchat.go
+++ b/work/externalcontact/groupchat.go
@@ -6,8 +6,8 @@ import (
 	"github.com/silenceper/wechat/v2/util"
 )
 
-// OpengIDToChatIDURL 客户群opengid转换URL
-const OpengIDToChatIDURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/opengid_to_chatid"
+// opengIDToChatIDURL 客户群opengid转换URL
+const opengIDToChatIDURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/opengid_to_chatid"
 
 type (
 	//GroupChatListRequest 获取客户群列表的请求参数
@@ -39,7 +39,7 @@ func (r *Client) GetGroupChatList(req *GroupChatListRequest) (*GroupChatListResp
 		return nil, err
 	}
 	var response []byte
-	response, err = util.PostJSON(fmt.Sprintf("%s/list?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/list?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return nil, err
 	}
@@ -100,7 +100,7 @@ func (r *Client) GetGroupChatDetail(req *GroupChatDetailRequest) (*GroupChatDeta
 		return nil, err
 	}
 	var response []byte
-	response, err = util.PostJSON(fmt.Sprintf("%s/get?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/get?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return nil, err
 	}
@@ -131,7 +131,7 @@ func (r *Client) OpengIDToChatID(req *OpengIDToChatIDRequest) (*OpengIDToChatIDR
 		return nil, err
 	}
 	var response []byte
-	response, err = util.PostJSON(fmt.Sprintf("%s?access_token=%s", OpengIDToChatIDURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s?access_token=%s", opengIDToChatIDURL, accessToken), req)
 	if err != nil {
 		return nil, err
 	}
diff --git a/work/externalcontact/join_way.go b/work/externalcontact/join_way.go
index 2396103..818a8ca 100644
--- a/work/externalcontact/join_way.go
+++ b/work/externalcontact/join_way.go
@@ -6,8 +6,8 @@ import (
 	"github.com/silenceper/wechat/v2/util"
 )
 
-// GroupChatURL 客户群
-const GroupChatURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat"
+// groupChatURL 客户群
+const groupChatURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat"
 
 type (
 	// AddJoinWayRequest 添加群配置请求参数
@@ -39,7 +39,7 @@ func (r *Client) AddJoinWay(req *AddJoinWayRequest) (*AddJoinWayResponse, error)
 	if accessToken, err = r.GetAccessToken(); err != nil {
 		return nil, err
 	}
-	response, err = util.PostJSON(fmt.Sprintf("%s/add_join_way?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/add_join_way?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return nil, err
 	}
@@ -86,7 +86,7 @@ func (r *Client) GetJoinWay(req *JoinWayConfigRequest) (*GetJoinWayResponse, err
 	if accessToken, err = r.GetAccessToken(); err != nil {
 		return nil, err
 	}
-	response, err = util.PostJSON(fmt.Sprintf("%s/get_join_way?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/get_join_way?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return nil, err
 	}
@@ -120,7 +120,7 @@ func (r *Client) UpdateJoinWay(req *UpdateJoinWayRequest) error {
 	if accessToken, err = r.GetAccessToken(); err != nil {
 		return err
 	}
-	response, err = util.PostJSON(fmt.Sprintf("%s/update_join_way?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/update_join_way?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return err
 	}
@@ -138,7 +138,7 @@ func (r *Client) DelJoinWay(req *JoinWayConfigRequest) error {
 	if accessToken, err = r.GetAccessToken(); err != nil {
 		return err
 	}
-	response, err = util.PostJSON(fmt.Sprintf("%s/del_join_way?access_token=%s", GroupChatURL, accessToken), req)
+	response, err = util.PostJSON(fmt.Sprintf("%s/del_join_way?access_token=%s", groupChatURL, accessToken), req)
 	if err != nil {
 		return err
 	}
diff --git a/work/externalcontact/msg.go b/work/externalcontact/msg.go
index 4d72ab4..5c2f901 100644
--- a/work/externalcontact/msg.go
+++ b/work/externalcontact/msg.go
@@ -7,24 +7,24 @@ import (
 )
 
 const (
-	// AddMsgTemplateURL 创建企业群发
-	AddMsgTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_msg_template?access_token=%s"
-	// GetGroupMsgListV2URL 获取群发记录列表
-	GetGroupMsgListV2URL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_list_v2?access_token=%s"
-	// GetGroupMsgTaskURL 获取群发成员发送任务列表
-	GetGroupMsgTaskURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_task?access_token=%s"
-	// GetGroupMsgSendResultURL 获取企业群发成员执行结果
-	GetGroupMsgSendResultURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_send_result?access_token=%s"
-	// SendWelcomeMsgURL 发送新客户欢迎语
-	SendWelcomeMsgURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/send_welcome_msg?access_token=%s"
-	// AddGroupWelcomeTemplateURL 添加入群欢迎语素材
-	AddGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/add?access_token=%s"
-	// EditGroupWelcomeTemplateURL 编辑入群欢迎语素材
-	EditGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/edit?access_token=%s"
-	// GetGroupWelcomeTemplateURL 获取入群欢迎语素材
-	GetGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/get?access_token=%s"
-	// DelGroupWelcomeTemplateURL 删除入群欢迎语素材
-	DelGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/del?access_token=%s"
+	// addMsgTemplateURL 创建企业群发
+	addMsgTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_msg_template?access_token=%s"
+	// getGroupMsgListV2URL 获取群发记录列表
+	getGroupMsgListV2URL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_list_v2?access_token=%s"
+	// getGroupMsgTaskURL 获取群发成员发送任务列表
+	getGroupMsgTaskURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_task?access_token=%s"
+	// getGroupMsgSendResultURL 获取企业群发成员执行结果
+	getGroupMsgSendResultURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_groupmsg_send_result?access_token=%s"
+	// sendWelcomeMsgURL 发送新客户欢迎语
+	sendWelcomeMsgURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/send_welcome_msg?access_token=%s"
+	// addGroupWelcomeTemplateURL 添加入群欢迎语素材
+	addGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/add?access_token=%s"
+	// editGroupWelcomeTemplateURL 编辑入群欢迎语素材
+	editGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/edit?access_token=%s"
+	// getGroupWelcomeTemplateURL 获取入群欢迎语素材
+	getGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/get?access_token=%s"
+	// delGroupWelcomeTemplateURL 删除入群欢迎语素材
+	delGroupWelcomeTemplateURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/group_welcome_template/del?access_token=%s"
 )
 
 // AddMsgTemplateRequest 创建企业群发请求
@@ -98,7 +98,7 @@ func (r *Client) AddMsgTemplate(req *AddMsgTemplateRequest) (*AddMsgTemplateResp
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(AddMsgTemplateURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(addMsgTemplateURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &AddMsgTemplateResponse{}
@@ -147,7 +147,7 @@ func (r *Client) GetGroupMsgListV2(req *GetGroupMsgListV2Request) (*GetGroupMsgL
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(GetGroupMsgListV2URL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(getGroupMsgListV2URL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &GetGroupMsgListV2Response{}
@@ -189,7 +189,7 @@ func (r *Client) GetGroupMsgTask(req *GetGroupMsgTaskRequest) (*GetGroupMsgTaskR
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(GetGroupMsgTaskURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(getGroupMsgTaskURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &GetGroupMsgTaskResponse{}
@@ -234,7 +234,7 @@ func (r *Client) GetGroupMsgSendResult(req *GetGroupMsgSendResultRequest) (*GetG
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(GetGroupMsgSendResultURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(getGroupMsgSendResultURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &GetGroupMsgSendResultResponse{}
@@ -267,7 +267,7 @@ func (r *Client) SendWelcomeMsg(req *SendWelcomeMsgRequest) error {
 		return err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(SendWelcomeMsgURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(sendWelcomeMsgURL, accessToken), req); err != nil {
 		return err
 	}
 	result := &SendWelcomeMsgResponse{}
@@ -306,7 +306,7 @@ func (r *Client) AddGroupWelcomeTemplate(req *AddGroupWelcomeTemplateRequest) (*
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(AddGroupWelcomeTemplateURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(addGroupWelcomeTemplateURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &AddGroupWelcomeTemplateResponse{}
@@ -344,7 +344,7 @@ func (r *Client) EditGroupWelcomeTemplate(req *EditGroupWelcomeTemplateRequest)
 		return err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(EditGroupWelcomeTemplateURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(editGroupWelcomeTemplateURL, accessToken), req); err != nil {
 		return err
 	}
 	result := &EditGroupWelcomeTemplateResponse{}
@@ -381,7 +381,7 @@ func (r *Client) GetGroupWelcomeTemplate(req *GetGroupWelcomeTemplateRequest) (*
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(GetGroupWelcomeTemplateURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(getGroupWelcomeTemplateURL, accessToken), req); err != nil {
 		return nil, err
 	}
 	result := &GetGroupWelcomeTemplateResponse{}
@@ -413,7 +413,7 @@ func (r *Client) DelGroupWelcomeTemplate(req *DelGroupWelcomeTemplateRequest) er
 		return err
 	}
 	var response []byte
-	if response, err = util.PostJSON(fmt.Sprintf(DelGroupWelcomeTemplateURL, accessToken), req); err != nil {
+	if response, err = util.PostJSON(fmt.Sprintf(delGroupWelcomeTemplateURL, accessToken), req); err != nil {
 		return err
 	}
 	result := &DelGroupWelcomeTemplateResponse{}
diff --git a/work/externalcontact/statistic.go b/work/externalcontact/statistic.go
index e308f66..2e00ae2 100644
--- a/work/externalcontact/statistic.go
+++ b/work/externalcontact/statistic.go
@@ -8,12 +8,12 @@ import (
 )
 
 const (
-	// GetUserBehaviorDataURL 获取「联系客户统计」数据
-	GetUserBehaviorDataURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_user_behavior_data"
-	// GetGroupChatStatURL 获取「群聊数据统计」数据 按群主聚合的方式
-	GetGroupChatStatURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat/statistic"
-	// GetGroupChatStatByDayURL 获取「群聊数据统计」数据 按自然日聚合的方式
-	GetGroupChatStatByDayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat/statistic_group_by_day"
+	// getUserBehaviorDataURL 获取「联系客户统计」数据
+	getUserBehaviorDataURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_user_behavior_data"
+	// getGroupChatStatURL 获取「群聊数据统计」数据 按群主聚合的方式
+	getGroupChatStatURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat/statistic"
+	// getGroupChatStatByDayURL 获取「群聊数据统计」数据 按自然日聚合的方式
+	getGroupChatStatByDayURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/groupchat/statistic_group_by_day"
 )
 
 type (
@@ -54,7 +54,7 @@ func (r *Client) GetUserBehaviorData(req *GetUserBehaviorRequest) ([]BehaviorDat
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", GetUserBehaviorDataURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", getUserBehaviorDataURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
@@ -120,7 +120,7 @@ func (r *Client) GetGroupChatStat(req *GetGroupChatStatRequest) (*GetGroupChatSt
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", GetGroupChatStatURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", getGroupChatStatURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
@@ -163,7 +163,7 @@ func (r *Client) GetGroupChatStatByDay(req *GetGroupChatStatByDayRequest) ([]Get
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", GetGroupChatStatByDayURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", getGroupChatStatByDayURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
diff --git a/work/externalcontact/tag.go b/work/externalcontact/tag.go
index 6095010..ce1ac92 100644
--- a/work/externalcontact/tag.go
+++ b/work/externalcontact/tag.go
@@ -8,16 +8,16 @@ import (
 )
 
 const (
-	// GetCropTagURL 获取标签列表
-	GetCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_corp_tag_list"
-	// AddCropTagURL 添加标签
-	AddCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_corp_tag"
-	// EditCropTagURL 修改标签
-	EditCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/edit_corp_tag"
-	// DelCropTagURL 删除标签
-	DelCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/del_corp_tag"
-	// MarkCropTagURL 为客户打上、删除标签
-	MarkCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/mark_tag"
+	// getCropTagURL 获取标签列表
+	getCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/get_corp_tag_list"
+	// addCropTagURL 添加标签
+	addCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/add_corp_tag"
+	// editCropTagURL 修改标签
+	editCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/edit_corp_tag"
+	// delCropTagURL 删除标签
+	delCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/del_corp_tag"
+	// markCropTagURL 为客户打上、删除标签
+	markCropTagURL = "https://qyapi.weixin.qq.com/cgi-bin/externalcontact/mark_tag"
 )
 
 // GetCropTagRequest 获取企业标签请求
@@ -63,7 +63,7 @@ func (r *Client) GetCropTagList(req GetCropTagRequest) ([]TagGroup, error) {
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", GetCropTagURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", getCropTagURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
@@ -109,7 +109,7 @@ func (r *Client) AddCropTag(req AddCropTagRequest) (*TagGroup, error) {
 	if err != nil {
 		return nil, err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", AddCropTagURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", addCropTagURL, accessToken), string(jsonData))
 	if err != nil {
 		return nil, err
 	}
@@ -141,7 +141,7 @@ func (r *Client) EditCropTag(req EditCropTagRequest) error {
 	if err != nil {
 		return err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", EditCropTagURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", editCropTagURL, accessToken), string(jsonData))
 	if err != nil {
 		return err
 	}
@@ -167,7 +167,7 @@ func (r *Client) DeleteCropTag(req DeleteCropTagRequest) error {
 	if err != nil {
 		return err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", DelCropTagURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", delCropTagURL, accessToken), string(jsonData))
 	if err != nil {
 		return err
 	}
@@ -195,7 +195,7 @@ func (r *Client) MarkTag(request MarkTagRequest) error {
 	if err != nil {
 		return err
 	}
-	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", MarkCropTagURL, accessToken), string(jsonData))
+	response, err = util.HTTPPost(fmt.Sprintf("%s?access_token=%v", markCropTagURL, accessToken), string(jsonData))
 	if err != nil {
 		return err
 	}
diff --git a/work/material/media.go b/work/material/media.go
index cb37344..1217e9c 100644
--- a/work/material/media.go
+++ b/work/material/media.go
@@ -7,11 +7,10 @@ import (
 )
 
 const (
-	// UploadImgURL 上传图片
-	UploadImgURL = "https://qyapi.weixin.qq.com/cgi-bin/media/uploadimg?access_token=%s"
-
-	// UploadTempFile 上传临时素材
-	UploadTempFile = "https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=%s&type=%s"
+	// uploadImgURL 上传图片
+	uploadImgURL = "https://qyapi.weixin.qq.com/cgi-bin/media/uploadimg?access_token=%s"
+	// uploadTempFile 上传临时素材
+	uploadTempFile = "https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=%s&type=%s"
 )
 
 // UploadImgResponse 上传图片响应
@@ -39,7 +38,7 @@ func (r *Client) UploadImg(filename string) (*UploadImgResponse, error) {
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostFile("media", filename, fmt.Sprintf(UploadImgURL, accessToken)); err != nil {
+	if response, err = util.PostFile("media", filename, fmt.Sprintf(uploadImgURL, accessToken)); err != nil {
 		return nil, err
 	}
 	result := &UploadImgResponse{}
@@ -61,7 +60,7 @@ func (r *Client) UploadTempFile(filename string, mediaType string) (*UploadTempF
 		return nil, err
 	}
 	var response []byte
-	if response, err = util.PostFile("media", filename, fmt.Sprintf(UploadTempFile, accessToken, mediaType)); err != nil {
+	if response, err = util.PostFile("media", filename, fmt.Sprintf(uploadTempFile, accessToken, mediaType)); err != nil {
 		return nil, err
 	}
 	result := &UploadTempFileResponse{}
diff --git a/work/robot/robot.go b/work/robot/robot.go
index 145f63d..eee3837 100644
--- a/work/robot/robot.go
+++ b/work/robot/robot.go
@@ -8,15 +8,15 @@ import (
 )
 
 const (
-	// WebhookSendURL 机器人发送群组消息
-	WebhookSendURL = "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=%s"
+	// webhookSendURL 机器人发送群组消息
+	webhookSendURL = "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=%s"
 )
 
 // RobotBroadcast 群机器人消息发送
 // @see https://developer.work.weixin.qq.com/document/path/91770
 func (r *Client) RobotBroadcast(webhookKey string, options interface{}) (info util.CommonError, err error) {
 	var data []byte
-	if data, err = util.PostJSON(fmt.Sprintf(WebhookSendURL, webhookKey), options); err != nil {
+	if data, err = util.PostJSON(fmt.Sprintf(webhookSendURL, webhookKey), options); err != nil {
 		return
 	}
 	if err = json.Unmarshal(data, &info); err != nil {