diff --git a/common/builder/user.go b/common/builder/user.go
deleted file mode 100644
index 91a5399..0000000
--- a/common/builder/user.go
+++ /dev/null
@@ -1,131 +0,0 @@
-package builder
-
-import (
-	"encoding/base64"
-	"fmt"
-	"github.com/Yuzuki616/V2bX/api/panel"
-	"github.com/xtls/xray-core/common/protocol"
-	"github.com/xtls/xray-core/common/serial"
-	"github.com/xtls/xray-core/infra/conf"
-	"github.com/xtls/xray-core/proxy/shadowsocks"
-	"github.com/xtls/xray-core/proxy/shadowsocks_2022"
-	"github.com/xtls/xray-core/proxy/trojan"
-	"github.com/xtls/xray-core/proxy/vless"
-	"strings"
-)
-
-func BuildVmessUsers(tag string, userInfo []panel.UserInfo) (users []*protocol.User) {
-	users = make([]*protocol.User, len(userInfo))
-	for i, user := range userInfo {
-		users[i] = BuildVmessUser(tag, &user)
-	}
-	return users
-}
-
-func BuildVmessUser(tag string, userInfo *panel.UserInfo) (user *protocol.User) {
-	vmessAccount := &conf.VMessAccount{
-		ID:       userInfo.Uuid,
-		AlterIds: 0,
-		Security: "auto",
-	}
-	return &protocol.User{
-		Level:   0,
-		Email:   BuildUserTag(tag, userInfo.Uuid), // Uid: InboundTag|email
-		Account: serial.ToTypedMessage(vmessAccount.Build()),
-	}
-}
-
-func BuildVlessUsers(tag string, userInfo []panel.UserInfo, flow string) (users []*protocol.User) {
-	users = make([]*protocol.User, len(userInfo))
-	for i := range userInfo {
-		users[i] = BuildVlessUser(tag, &(userInfo)[i], flow)
-	}
-	return users
-}
-
-func BuildVlessUser(tag string, userInfo *panel.UserInfo, flow string) (user *protocol.User) {
-	vlessAccount := &vless.Account{
-		Id: userInfo.Uuid,
-	}
-	vlessAccount.Flow = flow
-	return &protocol.User{
-		Level:   0,
-		Email:   BuildUserTag(tag, userInfo.Uuid),
-		Account: serial.ToTypedMessage(vlessAccount),
-	}
-}
-
-func BuildTrojanUsers(tag string, userInfo []panel.UserInfo) (users []*protocol.User) {
-	users = make([]*protocol.User, len(userInfo))
-	for i := range userInfo {
-		users[i] = BuildTrojanUser(tag, &(userInfo)[i])
-	}
-	return users
-}
-
-func BuildTrojanUser(tag string, userInfo *panel.UserInfo) (user *protocol.User) {
-	trojanAccount := &trojan.Account{
-		Password: userInfo.Uuid,
-	}
-	return &protocol.User{
-		Level:   0,
-		Email:   BuildUserTag(tag, userInfo.Uuid),
-		Account: serial.ToTypedMessage(trojanAccount),
-	}
-}
-func BuildSSUsers(tag string, userInfo []panel.UserInfo, cypher string, serverKey string) (users []*protocol.User) {
-	users = make([]*protocol.User, len(userInfo))
-	for i := range userInfo {
-		users[i] = BuildSSUser(tag, &userInfo[i], cypher, serverKey)
-	}
-	return users
-}
-
-func BuildSSUser(tag string, userInfo *panel.UserInfo, cypher string, serverKey string) (user *protocol.User) {
-	if serverKey == "" {
-		ssAccount := &shadowsocks.Account{
-			Password:   userInfo.Uuid,
-			CipherType: getCipherFromString(cypher),
-		}
-		return &protocol.User{
-			Level:   0,
-			Email:   BuildUserTag(tag, userInfo.Uuid),
-			Account: serial.ToTypedMessage(ssAccount),
-		}
-	} else {
-		var keyLength int
-		switch cypher {
-		case "2022-blake3-aes-128-gcm":
-			keyLength = 16
-		case "2022-blake3-aes-256-gcm":
-			keyLength = 32
-		}
-		ssAccount := &shadowsocks_2022.User{
-			Key: base64.StdEncoding.EncodeToString([]byte(userInfo.Uuid[:keyLength])),
-		}
-		return &protocol.User{
-			Level:   0,
-			Email:   BuildUserTag(tag, userInfo.Uuid),
-			Account: serial.ToTypedMessage(ssAccount),
-		}
-	}
-}
-
-func BuildUserTag(tag string, uuid string) string {
-	return fmt.Sprintf("%s|%s", tag, uuid)
-}
-
-func getCipherFromString(c string) shadowsocks.CipherType {
-	switch strings.ToLower(c) {
-	case "aes-128-gcm", "aead_aes_128_gcm":
-		return shadowsocks.CipherType_AES_128_GCM
-	case "aes-256-gcm", "aead_aes_256_gcm":
-		return shadowsocks.CipherType_AES_256_GCM
-	case "chacha20-poly1305", "aead_chacha20_poly1305", "chacha20-ietf-poly1305":
-		return shadowsocks.CipherType_CHACHA20_POLY1305
-	case "none", "plain":
-		return shadowsocks.CipherType_NONE
-	default:
-		return shadowsocks.CipherType_UNKNOWN
-	}
-}
diff --git a/common/format/user.go b/common/format/user.go
new file mode 100644
index 0000000..08cb9fb
--- /dev/null
+++ b/common/format/user.go
@@ -0,0 +1,9 @@
+package format
+
+import (
+	"fmt"
+)
+
+func UserTag(tag string, uuid string) string {
+	return fmt.Sprintf("%s|%s", tag, uuid)
+}
diff --git a/common/builder/inbound.go b/core/xray/inbound.go
similarity index 99%
rename from common/builder/inbound.go
rename to core/xray/inbound.go
index 21e3c9f..6198c96 100644
--- a/common/builder/inbound.go
+++ b/core/xray/inbound.go
@@ -1,4 +1,4 @@
-package builder
+package xray
 
 import (
 	"crypto/rand"
@@ -16,7 +16,7 @@ import (
 )
 
 // BuildInbound build Inbound config for different protocol
-func BuildInbound(config *conf.ControllerConfig, nodeInfo *panel.NodeInfo, tag string) (*core.InboundHandlerConfig, error) {
+func buildInbound(config *conf.ControllerConfig, nodeInfo *panel.NodeInfo, tag string) (*core.InboundHandlerConfig, error) {
 	in := &coreConf.InboundDetourConfig{}
 	// Set network protocol
 	t := coreConf.TransportProtocol(nodeInfo.Network)
diff --git a/core/xray/node.go b/core/xray/node.go
index 8dabad1..a26204a 100644
--- a/core/xray/node.go
+++ b/core/xray/node.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"github.com/Yuzuki616/V2bX/api/panel"
-	"github.com/Yuzuki616/V2bX/common/builder"
 	"github.com/Yuzuki616/V2bX/conf"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/inbound"
@@ -12,7 +11,7 @@ import (
 )
 
 func (c *Core) AddNode(tag string, info *panel.NodeInfo, config *conf.ControllerConfig) error {
-	inboundConfig, err := builder.BuildInbound(config, info, tag)
+	inboundConfig, err := buildInbound(config, info, tag)
 	if err != nil {
 		return fmt.Errorf("build inbound error: %s", err)
 	}
@@ -20,7 +19,7 @@ func (c *Core) AddNode(tag string, info *panel.NodeInfo, config *conf.Controller
 	if err != nil {
 		return fmt.Errorf("add inbound error: %s", err)
 	}
-	outBoundConfig, err := builder.BuildOutbound(config, tag)
+	outBoundConfig, err := buildOutbound(config, tag)
 	if err != nil {
 		return fmt.Errorf("build outbound error: %s", err)
 	}
diff --git a/common/builder/outbound.go b/core/xray/outbound.go
similarity index 93%
rename from common/builder/outbound.go
rename to core/xray/outbound.go
index f3be9b9..ee09bab 100644
--- a/common/builder/outbound.go
+++ b/core/xray/outbound.go
@@ -1,4 +1,4 @@
-package builder
+package xray
 
 import (
 	"fmt"
@@ -10,7 +10,7 @@ import (
 )
 
 // BuildOutbound build freedom outbund config for addoutbound
-func BuildOutbound(config *conf2.ControllerConfig, tag string) (*core.OutboundHandlerConfig, error) {
+func buildOutbound(config *conf2.ControllerConfig, tag string) (*core.OutboundHandlerConfig, error) {
 	outboundDetourConfig := &conf.OutboundDetourConfig{}
 	outboundDetourConfig.Protocol = "freedom"
 	outboundDetourConfig.Tag = tag
diff --git a/core/xray/ss.go b/core/xray/ss.go
new file mode 100644
index 0000000..299c2d7
--- /dev/null
+++ b/core/xray/ss.go
@@ -0,0 +1,65 @@
+package xray
+
+import (
+	"encoding/base64"
+	"github.com/Yuzuki616/V2bX/api/panel"
+	"github.com/Yuzuki616/V2bX/common/format"
+	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/proxy/shadowsocks"
+	"github.com/xtls/xray-core/proxy/shadowsocks_2022"
+	"strings"
+)
+
+func buildSSUsers(tag string, userInfo []panel.UserInfo, cypher string, serverKey string) (users []*protocol.User) {
+	users = make([]*protocol.User, len(userInfo))
+	for i := range userInfo {
+		users[i] = buildSSUser(tag, &userInfo[i], cypher, serverKey)
+	}
+	return users
+}
+
+func buildSSUser(tag string, userInfo *panel.UserInfo, cypher string, serverKey string) (user *protocol.User) {
+	if serverKey == "" {
+		ssAccount := &shadowsocks.Account{
+			Password:   userInfo.Uuid,
+			CipherType: getCipherFromString(cypher),
+		}
+		return &protocol.User{
+			Level:   0,
+			Email:   format.UserTag(tag, userInfo.Uuid),
+			Account: serial.ToTypedMessage(ssAccount),
+		}
+	} else {
+		var keyLength int
+		switch cypher {
+		case "2022-blake3-aes-128-gcm":
+			keyLength = 16
+		case "2022-blake3-aes-256-gcm":
+			keyLength = 32
+		}
+		ssAccount := &shadowsocks_2022.User{
+			Key: base64.StdEncoding.EncodeToString([]byte(userInfo.Uuid[:keyLength])),
+		}
+		return &protocol.User{
+			Level:   0,
+			Email:   format.UserTag(tag, userInfo.Uuid),
+			Account: serial.ToTypedMessage(ssAccount),
+		}
+	}
+}
+
+func getCipherFromString(c string) shadowsocks.CipherType {
+	switch strings.ToLower(c) {
+	case "aes-128-gcm", "aead_aes_128_gcm":
+		return shadowsocks.CipherType_AES_128_GCM
+	case "aes-256-gcm", "aead_aes_256_gcm":
+		return shadowsocks.CipherType_AES_256_GCM
+	case "chacha20-poly1305", "aead_chacha20_poly1305", "chacha20-ietf-poly1305":
+		return shadowsocks.CipherType_CHACHA20_POLY1305
+	case "none", "plain":
+		return shadowsocks.CipherType_NONE
+	default:
+		return shadowsocks.CipherType_UNKNOWN
+	}
+}
diff --git a/core/xray/trojan.go b/core/xray/trojan.go
new file mode 100644
index 0000000..cea6762
--- /dev/null
+++ b/core/xray/trojan.go
@@ -0,0 +1,28 @@
+package xray
+
+import (
+	"github.com/Yuzuki616/V2bX/api/panel"
+	"github.com/Yuzuki616/V2bX/common/format"
+	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/proxy/trojan"
+)
+
+func buildTrojanUsers(tag string, userInfo []panel.UserInfo) (users []*protocol.User) {
+	users = make([]*protocol.User, len(userInfo))
+	for i := range userInfo {
+		users[i] = buildTrojanUser(tag, &(userInfo)[i])
+	}
+	return users
+}
+
+func buildTrojanUser(tag string, userInfo *panel.UserInfo) (user *protocol.User) {
+	trojanAccount := &trojan.Account{
+		Password: userInfo.Uuid,
+	}
+	return &protocol.User{
+		Level:   0,
+		Email:   format.UserTag(tag, userInfo.Uuid),
+		Account: serial.ToTypedMessage(trojanAccount),
+	}
+}
diff --git a/core/xray/user.go b/core/xray/user.go
index b2a51e4..26dc933 100644
--- a/core/xray/user.go
+++ b/core/xray/user.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"fmt"
 	"github.com/Yuzuki616/V2bX/api/panel"
-	"github.com/Yuzuki616/V2bX/common/builder"
+	"github.com/Yuzuki616/V2bX/common/format"
 	vCore "github.com/Yuzuki616/V2bX/core"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy"
@@ -33,7 +33,7 @@ func (c *Core) DelUsers(users []panel.UserInfo, tag string) error {
 	}
 	var up, down, user string
 	for i := range users {
-		user = builder.BuildUserTag(tag, users[i].Uuid)
+		user = format.UserTag(tag, users[i].Uuid)
 		err = userManager.RemoveUser(context.Background(), user)
 		if err != nil {
 			return err
@@ -47,8 +47,8 @@ func (c *Core) DelUsers(users []panel.UserInfo, tag string) error {
 }
 
 func (c *Core) GetUserTraffic(tag, uuid string, reset bool) (up int64, down int64) {
-	upName := "user>>>" + builder.BuildUserTag(tag, uuid) + ">>>traffic>>>uplink"
-	downName := "user>>>" + builder.BuildUserTag(tag, uuid) + ">>>traffic>>>downlink"
+	upName := "user>>>" + format.UserTag(tag, uuid) + ">>>traffic>>>uplink"
+	downName := "user>>>" + format.UserTag(tag, uuid) + ">>>traffic>>>downlink"
 	upCounter := c.shm.GetCounter(upName)
 	downCounter := c.shm.GetCounter(downName)
 	if reset {
@@ -77,22 +77,22 @@ func (c *Core) AddUsers(p *vCore.AddUsersParams) (added int, err error) {
 			p.NodeInfo.ExtraConfig.EnableVless {
 			if p.Config.XrayOptions.VlessFlow != "" {
 				if p.Config.XrayOptions.VlessFlow == p.NodeInfo.ExtraConfig.VlessFlow {
-					users = builder.BuildVlessUsers(p.Tag, p.UserInfo, p.Config.XrayOptions.VlessFlow)
+					users = buildVlessUsers(p.Tag, p.UserInfo, p.Config.XrayOptions.VlessFlow)
 				} else {
-					users = builder.BuildVlessUsers(p.Tag, p.UserInfo, p.NodeInfo.ExtraConfig.VlessFlow)
+					users = buildVlessUsers(p.Tag, p.UserInfo, p.NodeInfo.ExtraConfig.VlessFlow)
 				}
 
 			} else {
-				users = builder.BuildVlessUsers(p.Tag, p.UserInfo, p.NodeInfo.ExtraConfig.VlessFlow)
+				users = buildVlessUsers(p.Tag, p.UserInfo, p.NodeInfo.ExtraConfig.VlessFlow)
 			}
 		} else {
-			users = builder.BuildVmessUsers(p.Tag, p.UserInfo)
+			users = buildVmessUsers(p.Tag, p.UserInfo)
 		}
 
 	case "trojan":
-		users = builder.BuildTrojanUsers(p.Tag, p.UserInfo)
+		users = buildTrojanUsers(p.Tag, p.UserInfo)
 	case "shadowsocks":
-		users = builder.BuildSSUsers(p.Tag,
+		users = buildSSUsers(p.Tag,
 			p.UserInfo,
 			p.NodeInfo.Cipher,
 			p.NodeInfo.ServerKey)
diff --git a/core/xray/vmess.go b/core/xray/vmess.go
new file mode 100644
index 0000000..75f93b6
--- /dev/null
+++ b/core/xray/vmess.go
@@ -0,0 +1,51 @@
+package xray
+
+import (
+	"github.com/Yuzuki616/V2bX/api/panel"
+	"github.com/Yuzuki616/V2bX/common/format"
+	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/infra/conf"
+	"github.com/xtls/xray-core/proxy/vless"
+)
+
+func buildVmessUsers(tag string, userInfo []panel.UserInfo) (users []*protocol.User) {
+	users = make([]*protocol.User, len(userInfo))
+	for i, user := range userInfo {
+		users[i] = buildVmessUser(tag, &user)
+	}
+	return users
+}
+
+func buildVmessUser(tag string, userInfo *panel.UserInfo) (user *protocol.User) {
+	vmessAccount := &conf.VMessAccount{
+		ID:       userInfo.Uuid,
+		AlterIds: 0,
+		Security: "auto",
+	}
+	return &protocol.User{
+		Level:   0,
+		Email:   format.UserTag(tag, userInfo.Uuid), // Uid: InboundTag|email
+		Account: serial.ToTypedMessage(vmessAccount.Build()),
+	}
+}
+
+func buildVlessUsers(tag string, userInfo []panel.UserInfo, flow string) (users []*protocol.User) {
+	users = make([]*protocol.User, len(userInfo))
+	for i := range userInfo {
+		users[i] = buildVlessUser(tag, &(userInfo)[i], flow)
+	}
+	return users
+}
+
+func buildVlessUser(tag string, userInfo *panel.UserInfo, flow string) (user *protocol.User) {
+	vlessAccount := &vless.Account{
+		Id: userInfo.Uuid,
+	}
+	vlessAccount.Flow = flow
+	return &protocol.User{
+		Level:   0,
+		Email:   format.UserTag(tag, userInfo.Uuid),
+		Account: serial.ToTypedMessage(vlessAccount),
+	}
+}
diff --git a/limiter/dynamic.go b/limiter/dynamic.go
index a74599e..b68a19d 100644
--- a/limiter/dynamic.go
+++ b/limiter/dynamic.go
@@ -2,7 +2,7 @@ package limiter
 
 import (
 	"github.com/Yuzuki616/V2bX/api/panel"
-	"github.com/Yuzuki616/V2bX/common/builder"
+	"github.com/Yuzuki616/V2bX/common/format"
 	"time"
 )
 
@@ -11,7 +11,7 @@ func (l *Limiter) AddDynamicSpeedLimit(tag string, userInfo *panel.UserInfo, lim
 		DynamicSpeedLimit: limitNum,
 		ExpireTime:        time.Now().Add(time.Duration(expire) * time.Second).Unix(),
 	}
-	l.UserLimitInfo.Store(builder.BuildUserTag(tag, userInfo.Uuid), userLimit)
+	l.UserLimitInfo.Store(format.UserTag(tag, userInfo.Uuid), userLimit)
 	return nil
 }
 
diff --git a/limiter/limiter.go b/limiter/limiter.go
index 45c4583..149538a 100644
--- a/limiter/limiter.go
+++ b/limiter/limiter.go
@@ -4,7 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/Yuzuki616/V2bX/api/panel"
-	"github.com/Yuzuki616/V2bX/common/builder"
+	"github.com/Yuzuki616/V2bX/common/format"
 	"github.com/Yuzuki616/V2bX/conf"
 	"github.com/juju/ratelimit"
 	log "github.com/sirupsen/logrus"
@@ -61,7 +61,7 @@ func AddLimiter(tag string, l *conf.LimitConfig, users []panel.UserInfo) *Limite
 				SpeedLimit: users[i].SpeedLimit,
 				ExpireTime: 0,
 			}
-			info.UserLimitInfo.Store(builder.BuildUserTag(tag, users[i].Uuid), userLimit)
+			info.UserLimitInfo.Store(format.UserTag(tag, users[i].Uuid), userLimit)
 		}
 	}
 	limitLock.Lock()
@@ -86,7 +86,7 @@ func UpdateLimiter(tag string, added []panel.UserInfo, deleted []panel.UserInfo)
 		return fmt.Errorf("get limit error: %s", err)
 	}
 	for i := range deleted {
-		l.UserLimitInfo.Delete(builder.BuildUserTag(tag, deleted[i].Uuid))
+		l.UserLimitInfo.Delete(format.UserTag(tag, deleted[i].Uuid))
 	}
 	for i := range added {
 		if added[i].SpeedLimit != 0 {
@@ -95,7 +95,7 @@ func UpdateLimiter(tag string, added []panel.UserInfo, deleted []panel.UserInfo)
 				SpeedLimit: added[i].SpeedLimit,
 				ExpireTime: 0,
 			}
-			l.UserLimitInfo.Store(builder.BuildUserTag(tag, added[i].Uuid), userLimit)
+			l.UserLimitInfo.Store(format.UserTag(tag, added[i].Uuid), userLimit)
 		}
 	}
 	return nil