diff --git a/coolq/api.go b/coolq/api.go
index fd2566e..7d99bf0 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -1561,7 +1561,7 @@ func (bot *CQBot) CQGetForwardMessage(resID string) global.MSG {
 		r := make([]global.MSG, len(nodes))
 		for i, n := range nodes {
 			bot.checkMedia(n.Message, 0)
-			content := ToFormattedMessage(n.Message, message.Source{SourceType: message.SourceGroup}, false)
+			content := ToFormattedMessage(n.Message, message.Source{SourceType: message.SourceGroup})
 			if len(n.Message) == 1 {
 				if forward, ok := n.Message[0].(*message.ForwardMessage); ok {
 					content = transformNodes(forward.Nodes)
@@ -1610,9 +1610,9 @@ func (bot *CQBot) CQGetMessage(messageID int32) global.MSG {
 	switch o := msg.(type) {
 	case *db.StoredGroupMessage:
 		m["group_id"] = o.GroupCode
-		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, message.SourceGroup), message.Source{SourceType: message.SourceGroup, PrimaryID: o.GroupCode}, false)
+		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, message.SourceGroup), message.Source{SourceType: message.SourceGroup, PrimaryID: o.GroupCode})
 	case *db.StoredPrivateMessage:
-		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, message.SourcePrivate), message.Source{SourceType: message.SourcePrivate}, false)
+		m["message"] = ToFormattedMessage(bot.ConvertContentMessage(o.Content, message.SourcePrivate), message.Source{SourceType: message.SourcePrivate})
 	}
 	return OK(m)
 }
@@ -1657,7 +1657,7 @@ func (bot *CQBot) CQGetGuildMessage(messageID string, noCache bool) global.MSG {
 				"tiny_id":  fU64(pull[0].Sender.TinyId),
 				"nickname": pull[0].Sender.Nickname,
 			}
-			m["message"] = ToFormattedMessage(pull[0].Elements, source, false)
+			m["message"] = ToFormattedMessage(pull[0].Elements, source)
 			m["reactions"] = convertReactions(pull[0].Reactions)
 			bot.InsertGuildChannelMessage(pull[0])
 		} else {
@@ -1672,7 +1672,7 @@ func (bot *CQBot) CQGetGuildMessage(messageID string, noCache bool) global.MSG {
 				"tiny_id":  fU64(channelMsgByDB.Attribute.SenderTinyID),
 				"nickname": channelMsgByDB.Attribute.SenderName,
 			}
-			m["message"] = ToFormattedMessage(bot.ConvertContentMessage(channelMsgByDB.Content, message.SourceGuildChannel), source, false)
+			m["message"] = ToFormattedMessage(bot.ConvertContentMessage(channelMsgByDB.Content, message.SourceGuildChannel), source)
 		}
 	case message.SourceGuildDirect:
 		// todo(mrs4s): 支持 direct 消息
diff --git a/coolq/converter.go b/coolq/converter.go
index 2116c7a..d185b64 100644
--- a/coolq/converter.go
+++ b/coolq/converter.go
@@ -65,7 +65,7 @@ func (bot *CQBot) formatGroupMessage(m *message.GroupMessage) *event {
 		SourceType: message.SourceGroup,
 		PrimaryID:  m.GroupCode,
 	}
-	cqm := toStringMessage(m.Elements, source, true)
+	cqm := toStringMessage(m.Elements, source)
 	typ := "message/group/normal"
 	if m.Sender.Uin == bot.Client.Uin {
 		typ = "message_sent/group/normal"
@@ -74,7 +74,7 @@ func (bot *CQBot) formatGroupMessage(m *message.GroupMessage) *event {
 		"anonymous":    nil,
 		"font":         0,
 		"group_id":     m.GroupCode,
-		"message":      ToFormattedMessage(m.Elements, source, false),
+		"message":      ToFormattedMessage(m.Elements, source),
 		"message_type": "group",
 		"message_seq":  m.Id,
 		"raw_message":  cqm,
@@ -210,11 +210,11 @@ func convertReactions(reactions []*message.GuildMessageEmojiReaction) (r []globa
 	return
 }
 
-func toStringMessage(m []message.IMessageElement, source message.Source, raw bool) string {
-	elems := toElements(m, source, raw)
+func toStringMessage(m []message.IMessageElement, source message.Source) string {
+	elems := toElements(m, source)
 	var sb strings.Builder
 	for _, elem := range elems {
-		sb.WriteString(elem.CQCode())
+		elem.WriteCQCodeTo(&sb)
 	}
 	return sb.String()
 }
diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 59c7d23..17b7777 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -95,7 +95,7 @@ func replyID(r *message.ReplyElement, source message.Source) int32 {
 // toElements 将消息元素数组转为MSG数组以用于消息上报
 //
 // nolint:govet
-func toElements(e []message.IMessageElement, source message.Source, raw bool) (r []cqcode.Element) {
+func toElements(e []message.IMessageElement, source message.Source) (r []cqcode.Element) {
 	type pair = cqcode.Pair // simplify code
 	type pairs = []pair
 
@@ -111,7 +111,7 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 		elem := cqcode.Element{
 			Type: "reply",
 			Data: pairs{
-				{"id", strconv.FormatInt(int64(id), 10)},
+				{K: "id", V: strconv.FormatInt(int64(id), 10)},
 			},
 		}
 		if base.ExtraReplyData {
@@ -119,7 +119,7 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 				pair{K: "seq", V: strconv.FormatInt(int64(replyElem.ReplySeq), 10)},
 				pair{K: "qq", V: strconv.FormatInt(replyElem.Sender, 10)},
 				pair{K: "time", V: strconv.FormatInt(int64(replyElem.Time), 10)},
-				pair{K: "text", V: toStringMessage(replyElem.Elements, source, true)},
+				pair{K: "text", V: toStringMessage(replyElem.Elements, source)},
 			)
 		}
 		r = append(r, elem)
@@ -139,14 +139,14 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			m = cqcode.Element{
 				Type: "text",
 				Data: pairs{
-					{"text", o.Content},
+					{K: "text", V: o.Content},
 				},
 			}
 		case *message.LightAppElement:
 			m = cqcode.Element{
 				Type: "json",
 				Data: pairs{
-					{"data", o.Content},
+					{K: "data", V: o.Content},
 				},
 			}
 		case *message.AtElement:
@@ -157,53 +157,51 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			m = cqcode.Element{
 				Type: "at",
 				Data: pairs{
-					{"qq", target},
+					{K: "qq", V: target},
 				},
 			}
 		case *message.RedBagElement:
 			m = cqcode.Element{
 				Type: "redbag",
 				Data: pairs{
-					{"title", o.Title},
+					{K: "title", V: o.Title},
 				},
 			}
 		case *message.ForwardElement:
 			m = cqcode.Element{
 				Type: "forward",
 				Data: pairs{
-					{"id", o.ResId},
+					{K: "id", V: o.ResId},
 				},
 			}
 		case *message.FaceElement:
 			m = cqcode.Element{
 				Type: "face",
 				Data: pairs{
-					{"id", strconv.FormatInt(int64(o.Index), 10)},
+					{K: "id", V: strconv.FormatInt(int64(o.Index), 10)},
 				},
 			}
 		case *message.VoiceElement:
 			m = cqcode.Element{
 				Type: "record",
 				Data: pairs{
-					{"file", o.Name},
-					{"url", o.Url},
+					{K: "file", V: o.Name},
+					{K: "url", V: o.Url},
 				},
 			}
 		case *message.ShortVideoElement:
 			m = cqcode.Element{
 				Type: "video",
 				Data: pairs{
-					{"file", o.Name},
-					{"url", o.Url},
+					{K: "file", V: o.Name},
+					{K: "url", V: o.Url},
 				},
 			}
 		case *message.GroupImageElement:
 			data := pairs{
-				{"file", hex.EncodeToString(o.Md5) + ".image"},
-				{"subType", strconv.FormatInt(int64(o.ImageBizType), 10)},
-			}
-			if raw {
-				data = append(data, pair{K: "url", V: o.Url})
+				{K: "file", V: hex.EncodeToString(o.Md5) + ".image"},
+				{K: "subType", V: strconv.FormatInt(int64(o.ImageBizType), 10)},
+				{K: "url", V: o.Url},
 			}
 			switch {
 			case o.Flash:
@@ -218,10 +216,8 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			}
 		case *message.GuildImageElement:
 			data := pairs{
-				{"file", hex.EncodeToString(o.Md5) + ".image"},
-			}
-			if raw {
-				data = append(data, pair{K: "url", V: o.Url})
+				{K: "file", V: hex.EncodeToString(o.Md5) + ".image"},
+				{K: "url", V: o.Url},
 			}
 			m = cqcode.Element{
 				Type: "image",
@@ -229,10 +225,8 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			}
 		case *message.FriendImageElement:
 			data := pairs{
-				{"file", hex.EncodeToString(o.Md5) + ".image"},
-			}
-			if raw {
-				data = append(data, pair{K: "url", V: o.Url})
+				{K: "file", V: hex.EncodeToString(o.Md5) + ".image"},
+				{K: "url", V: o.Url},
 			}
 			if o.Flash {
 				data = append(data, pair{K: "type", V: "flash"})
@@ -245,29 +239,29 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			m = cqcode.Element{
 				Type: "dice",
 				Data: pairs{
-					{"value", strconv.FormatInt(int64(o.Value), 10)},
+					{K: "value", V: strconv.FormatInt(int64(o.Value), 10)},
 				},
 			}
 		case *message.FingerGuessingElement:
 			m = cqcode.Element{
 				Type: "rps",
 				Data: pairs{
-					{"value", strconv.FormatInt(int64(o.Value), 10)},
+					{K: "value", V: strconv.FormatInt(int64(o.Value), 10)},
 				},
 			}
 		case *message.MarketFaceElement:
 			m = cqcode.Element{
 				Type: "text",
 				Data: pairs{
-					{"text", o.Name},
+					{K: "text", V: o.Name},
 				},
 			}
 		case *message.ServiceElement:
 			m = cqcode.Element{
 				Type: "xml",
 				Data: pairs{
-					{"data", o.Content},
-					{"resid", o.ResId},
+					{K: "data", V: o.Content},
+					{K: "resid", V: o.ResId},
 				},
 			}
 			if !strings.Contains(o.Content, "<?xml") {
@@ -277,8 +271,8 @@ func toElements(e []message.IMessageElement, source message.Source, raw bool) (r
 			m = cqcode.Element{
 				Type: "face",
 				Data: pairs{
-					{"id", strconv.FormatInt(int64(o.ID), 10)},
-					{"type", "sticker"},
+					{K: "id", V: strconv.FormatInt(int64(o.ID), 10)},
+					{K: "type", V: "sticker"},
 				},
 			}
 		default:
diff --git a/coolq/cqcode/element.go b/coolq/cqcode/element.go
index 8355925..2605d5a 100644
--- a/coolq/cqcode/element.go
+++ b/coolq/cqcode/element.go
@@ -1,10 +1,11 @@
 package cqcode
 
 import (
-	"fmt"
+	"bytes"
+	"strconv"
 	"strings"
 
-	"github.com/Mrs4s/go-cqhttp/global"
+	"github.com/Mrs4s/MiraiGo/binary"
 )
 
 // Element single message
@@ -19,12 +20,19 @@ type Pair struct {
 	V string
 }
 
-// CQCode convert to cqcode
+// CQCode convert element to cqcode
 func (e *Element) CQCode() string {
+	buf := strings.Builder{}
+	e.WriteCQCodeTo(&buf)
+	return buf.String()
+}
+
+// WriteCQCodeTo write element's cqcode into sb
+func (e *Element) WriteCQCodeTo(sb *strings.Builder) {
 	if e.Type == "text" {
-		return EscapeText(e.Data[0].V) // must be {"text": value}
+		sb.WriteString(EscapeText(e.Data[0].V)) // must be {"text": value}
+		return
 	}
-	var sb strings.Builder
 	sb.WriteString("[CQ:")
 	sb.WriteString(e.Type)
 	for _, data := range e.Data {
@@ -34,22 +42,26 @@ func (e *Element) CQCode() string {
 		sb.WriteString(EscapeValue(data.V))
 	}
 	sb.WriteByte(']')
-	return sb.String()
 }
 
 // MarshalJSON see encoding/json.Marshaler
 func (e *Element) MarshalJSON() ([]byte, error) {
-	buf := global.NewBuffer()
-	defer global.PutBuffer(buf)
-
-	fmt.Fprintf(buf, `{"type":"%s","data":{`, e.Type)
-	for i, data := range e.Data {
-		if i != 0 {
-			buf.WriteByte(',')
+	return binary.NewWriterF(func(w *binary.Writer) {
+		buf := (*bytes.Buffer)(w)
+		// fmt.Fprintf(buf, `{"type":"%s","data":{`, e.Type)
+		buf.WriteString(`{"type":"`)
+		buf.WriteString(e.Type)
+		buf.WriteString(`","data":{`)
+		for i, data := range e.Data {
+			if i != 0 {
+				buf.WriteByte(',')
+			}
+			// fmt.Fprintf(buf, `"%s":%q`, data.K, data.V)
+			buf.WriteByte('"')
+			buf.WriteString(data.K)
+			buf.WriteString(`":`)
+			buf.WriteString(strconv.Quote(data.V))
 		}
-		fmt.Fprintf(buf, `"%s":%q`, data.K, data.V)
-	}
-	buf.WriteString(`}}`)
-
-	return append([]byte(nil), buf.Bytes()...), nil
+		buf.WriteString(`}}`)
+	}), nil
 }
diff --git a/coolq/event.go b/coolq/event.go
index 74642b1..ebdc960 100644
--- a/coolq/event.go
+++ b/coolq/event.go
@@ -21,11 +21,11 @@ import (
 )
 
 // ToFormattedMessage 将给定[]message.IMessageElement转换为通过coolq.SetMessageFormat所定义的消息上报格式
-func ToFormattedMessage(e []message.IMessageElement, source message.Source, raw bool) (r interface{}) {
+func ToFormattedMessage(e []message.IMessageElement, source message.Source) (r interface{}) {
 	if base.PostFormat == "string" {
-		r = toStringMessage(e, source, raw)
+		r = toStringMessage(e, source)
 	} else if base.PostFormat == "array" {
-		r = toElements(e, source, raw)
+		r = toElements(e, source)
 	}
 	return
 }
@@ -74,7 +74,7 @@ func (bot *CQBot) privateMessageEvent(_ *client.QQClient, m *message.PrivateMess
 		SourceType: message.SourcePrivate,
 		PrimaryID:  m.Sender.Uin,
 	}
-	cqm := toStringMessage(m.Elements, source, true)
+	cqm := toStringMessage(m.Elements, source)
 	id := bot.InsertPrivateMessage(m)
 	log.Infof("收到好友 %v(%v) 的消息: %v (%v)", m.Sender.DisplayName(), m.Sender.Uin, cqm, id)
 	typ := "message/private/friend"
@@ -85,7 +85,7 @@ func (bot *CQBot) privateMessageEvent(_ *client.QQClient, m *message.PrivateMess
 		"message_id":  id,
 		"user_id":     m.Sender.Uin,
 		"target_id":   m.Target,
-		"message":     ToFormattedMessage(m.Elements, source, false),
+		"message":     ToFormattedMessage(m.Elements, source),
 		"raw_message": cqm,
 		"font":        0,
 		"sender": global.MSG{
@@ -121,7 +121,7 @@ func (bot *CQBot) groupMessageEvent(c *client.QQClient, m *message.GroupMessage)
 		SourceType: message.SourceGroup,
 		PrimaryID:  m.GroupCode,
 	}
-	cqm := toStringMessage(m.Elements, source, true)
+	cqm := toStringMessage(m.Elements, source)
 	id := bot.InsertGroupMessage(m)
 	log.Infof("收到群 %v(%v) 内 %v(%v) 的消息: %v (%v)", m.GroupName, m.GroupCode, m.Sender.DisplayName(), m.Sender.Uin, cqm, id)
 	gm := bot.formatGroupMessage(m)
@@ -139,7 +139,7 @@ func (bot *CQBot) tempMessageEvent(c *client.QQClient, e *client.TempMessageEven
 		SourceType: message.SourcePrivate,
 		PrimaryID:  e.Session.Sender,
 	}
-	cqm := toStringMessage(m.Elements, source, true)
+	cqm := toStringMessage(m.Elements, source)
 	bot.tempSessionCache.Store(m.Sender.Uin, e.Session)
 	id := m.Id
 	// todo(Mrs4s)
@@ -151,7 +151,7 @@ func (bot *CQBot) tempMessageEvent(c *client.QQClient, e *client.TempMessageEven
 		"temp_source": e.Session.Source,
 		"message_id":  id,
 		"user_id":     m.Sender.Uin,
-		"message":     ToFormattedMessage(m.Elements, source, false),
+		"message":     ToFormattedMessage(m.Elements, source),
 		"raw_message": cqm,
 		"font":        0,
 		"sender": global.MSG{
@@ -177,14 +177,14 @@ func (bot *CQBot) guildChannelMessageEvent(c *client.QQClient, m *message.GuildC
 		PrimaryID:   int64(m.GuildId),
 		SecondaryID: int64(m.ChannelId),
 	}
-	log.Infof("收到来自频道 %v(%v) 子频道 %v(%v) 内 %v(%v) 的消息: %v", guild.GuildName, guild.GuildId, channel.ChannelName, m.ChannelId, m.Sender.Nickname, m.Sender.TinyId, toStringMessage(m.Elements, source, true))
+	log.Infof("收到来自频道 %v(%v) 子频道 %v(%v) 内 %v(%v) 的消息: %v", guild.GuildName, guild.GuildId, channel.ChannelName, m.ChannelId, m.Sender.Nickname, m.Sender.TinyId, toStringMessage(m.Elements, source))
 	id := bot.InsertGuildChannelMessage(m)
 	ev := bot.event("message/guild/channel", global.MSG{
 		"guild_id":     fU64(m.GuildId),
 		"channel_id":   fU64(m.ChannelId),
 		"message_id":   id,
 		"user_id":      fU64(m.Sender.TinyId),
-		"message":      ToFormattedMessage(m.Elements, source, false), // todo: 增加对频道消息 Reply 的支持
+		"message":      ToFormattedMessage(m.Elements, source), // todo: 增加对频道消息 Reply 的支持
 		"self_tiny_id": fU64(bot.Client.GuildService.TinyId),
 		"sender": global.MSG{
 			"user_id":  m.Sender.TinyId,