diff --git a/wechat/mq/mq.go b/wechat/mq/mq.go
index 0cf0797..510ba89 100644
--- a/wechat/mq/mq.go
+++ b/wechat/mq/mq.go
@@ -2,7 +2,6 @@ package mq
 
 import (
 	"context"
-	"log"
 	"log/slog"
 	"time"
 
@@ -12,6 +11,10 @@ import (
 
 const MSGPACK_MIME = "application/msgpack"
 
+func Dial(url string) (*amqp.Connection, error) {
+	return amqp.Dial(url)
+}
+
 func MsgpMsg(m msgp.Marshaler) (amqp.Publishing, error) {
 	bs, err := m.MarshalMsg(nil)
 	if err != nil {
@@ -21,39 +24,42 @@ func MsgpMsg(m msgp.Marshaler) (amqp.Publishing, error) {
 	return amqp.Publishing{Body: bs, ContentType: MSGPACK_MIME}, nil
 }
 
-func failOnError(err error, msg string) {
-	if err != nil {
-		log.Panicf("%s: %s", msg, err)
-	}
-}
-
 type MQ struct {
-	Conn         *amqp.Connection
-	ExchangeName string
-	Timeout      time.Duration
+	timeout time.Duration
+	logger  *slog.Logger
 
-	Logger *slog.Logger
+	conn         *amqp.Connection
+	exchangeName string
 
 	ch *amqp.Channel
+
+	binit bool
 }
 
 func New(logger *slog.Logger, timeout time.Duration) *MQ {
 	return &MQ{
-		Timeout: timeout,
-		Logger:  logger,
+		timeout: timeout,
+		logger:  logger,
+		binit:   false,
 	}
 }
 
-func (q *MQ) BuildWith(conn *amqp.Connection) {
+func (q *MQ) BuildWith(conn *amqp.Connection, exanme string) error {
+	if !q.binit {
+		return nil
+	}
+
 	var err error
 
-	q.Conn = conn
+	q.conn = conn
+	q.exchangeName = exanme
 
-	q.ch, err = q.Conn.Channel()
-	failOnError(err, "Failed to open a channel")
+	if q.ch, err = q.conn.Channel(); err != nil {
+		return err
+	}
 
 	err = q.ch.ExchangeDeclare(
-		q.ExchangeName,     // name
+		q.exchangeName,     // name
 		amqp.ExchangeTopic, // type
 		true,               // durable
 		true,               // auto-deleted
@@ -61,16 +67,15 @@ func (q *MQ) BuildWith(conn *amqp.Connection) {
 		false,              // no-wait
 		nil,                // arguments
 	)
-	failOnError(err, "Failed to declare an exchange")
-
+	return err
 }
 
 func (mq *MQ) Send(ctx context.Context, routingKey string, msg amqp.Publishing) error {
-	octx, cancel := context.WithTimeout(ctx, mq.Timeout)
+	octx, cancel := context.WithTimeout(ctx, mq.timeout)
 	defer cancel()
 
 	err := mq.ch.PublishWithContext(octx,
-		mq.ExchangeName, // exchange
+		mq.exchangeName, // exchange
 		routingKey,      // routing key
 		false,           // mandatory
 		false,           // immediate
@@ -80,6 +85,5 @@ func (mq *MQ) Send(ctx context.Context, routingKey string, msg amqp.Publishing)
 }
 
 func (mq *MQ) Close() error {
-	mq.ch.Close()
-	return nil
+	return mq.ch.Close()
 }