diff --git a/core/function.go b/core/function.go
index 32a94c0..eaa7aac 100644
--- a/core/function.go
+++ b/core/function.go
@@ -1,6 +1,7 @@
 package core
 
 import (
+	"fmt"
 	"os"
 	"regexp"
 	"strings"
@@ -56,7 +57,6 @@ func AddCommand(prefix string, cmds []Function) {
 			if prefix != "" {
 				cmds[j].Rules[i] = prefix + `\s+` + cmds[j].Rules[i]
 			}
-
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], "(", `[(]`, -1)
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], ")", `[)]`, -1)
 			cmds[j].Rules[i] = regexp.MustCompile(`\?$`).ReplaceAllString(cmds[j].Rules[i], `(.+)`)
@@ -80,6 +80,15 @@ func AddCommand(prefix string, cmds []Function) {
 
 func handleMessage(sender Sender) {
 	defer sender.Finish()
+	key := fmt.Sprintf("u=%v&c=%v&i=%v", sender.GetUserID(), sender.GetChatID(), sender.GetImType())
+	if v, ok := waits.Load(key); ok {
+		c := v.(Carry)
+		if m := regexp.MustCompile(c.Pattern).FindString(sender.GetContent()); m != "" {
+			c.Chan <- m
+			sender.Reply(<-c.Result)
+			return
+		}
+	}
 	for _, function := range functions {
 		for _, rule := range function.Rules {
 			var matched bool
diff --git a/core/im.go b/core/im.go
index 0085bbd..2be3f9f 100644
--- a/core/im.go
+++ b/core/im.go
@@ -1,6 +1,9 @@
 package core
 
 import (
+	"errors"
+	"fmt"
+	"sync"
 	"time"
 )
 
@@ -27,6 +30,7 @@ type Sender interface {
 	Finish()
 	Continue()
 	IsContinue() bool
+	Await(func(string, error) interface{}, ...interface{})
 }
 
 type Edit int
@@ -196,3 +200,65 @@ func (sender *BaseSender) IsReply() bool {
 func (sender *BaseSender) GetMessageID() int {
 	return 0
 }
+
+func (sender *BaseSender) GetUserID() interface{} {
+	return nil
+}
+func (sender *BaseSender) GetChatID() interface{} {
+	return nil
+}
+func (sender *BaseSender) GetImType() string {
+	return ""
+}
+
+var TimeOutError = errors.New("指令超时")
+var InterruptError = errors.New("被其他指令中断")
+
+var waits sync.Map
+
+type Carry struct {
+	Chan    chan interface{}
+	Pattern string
+	Result  chan interface{}
+}
+
+func (sender *BaseSender) Await(callback func(string, error) interface{}, params ...interface{}) {
+	c := Carry{}
+	timeout := time.Second * 20
+	for _, param := range params {
+		switch param.(type) {
+		case string:
+			c.Pattern = param.(string)
+		case time.Duration:
+			timeout = param.(time.Duration)
+		case func() string:
+			callback = param.(func(string, error) interface{})
+		}
+	}
+	if callback == nil {
+		return
+	}
+	if c.Pattern == "" {
+		return
+	}
+	c.Chan = make(chan interface{}, 1)
+	c.Result = make(chan interface{}, 1)
+	key := fmt.Sprintf("u=%v&c=%v&i=%v", sender.GetUserID(), sender.GetChatID(), sender.GetImType())
+	if oc, ok := waits.LoadOrStore(key, c); ok {
+		oc.(Carry).Chan <- InterruptError
+	}
+	defer waits.Delete(key)
+	select {
+	case result := <-c.Chan:
+		switch result.(type) {
+		case string:
+			c.Result <- callback(result.(string), nil)
+			return
+		case error:
+			c.Result <- callback("", result.(error))
+		}
+		return
+	case <-time.After(timeout):
+		c.Result <- callback("", TimeOutError)
+	}
+}
diff --git a/core/test.go b/core/test.go
index ae61206..24c134d 100644
--- a/core/test.go
+++ b/core/test.go
@@ -161,8 +161,18 @@ func initSys() {
 				if !IsBucket(b) {
 					return errors.New("不存在的存储桶")
 				}
+				old := b.Get(s.Get(1))
 				b.Set(s.Get(1), s.Get(2))
-				return "设置成功"
+				go func() {
+					s.Await(func(_ string, e error) interface{} {
+						if e != nil {
+							return nil
+						}
+						b.Set(s.Get(1), old)
+						return "已撤回。"
+					}, "^撤回$", time.Second*60)
+				}()
+				return "操作成功，如果你后悔了，请在60s内对我说\"撤回\"，即可撤销本次操作。"
 			},
 		},
 		{
diff --git a/im/wxmp/init.go b/im/wxmp/init.go
index 5de9ea4..8c55b61 100644
--- a/im/wxmp/init.go
+++ b/im/wxmp/init.go
@@ -45,6 +45,7 @@ func init() {
 				sender.uid = int(time.Now().UnixNano())
 				u2i.Set(msg.FromUserName, sender.uid)
 			}
+
 			core.Senders <- sender
 			end := <-sender.Wait
 			ss := []string{}