diff --git a/example/api-ai-bot.ts b/example/api-ai-bot.ts
index 2efcf388c92a7df202d6fbf5ac96bed00b411a01..c08b18e9fff09f14cfb31f72222b9b2f5ea8ad31 100644
--- a/example/api-ai-bot.ts
+++ b/example/api-ai-bot.ts
@@ -10,6 +10,10 @@
  * Wechaty - https://github.com/zixia/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import { Brolog as log } from 'brolog'
 /* tslint:disable:no-var-requires */
 const co  = require('co')
@@ -47,7 +51,11 @@ Loading... please wait for QrCode Image Url and then scan to login.
 
 bot
 .on('scan', (url, code) => {
-  console.log(`[${code}]Scan QR Code in url to login:\n${url}`)
+  if (!/201|200/.test(String(code))) {
+    let loginUrl = url.replace(/\/qrcode\//, '/l/')
+    QrcodeTerminal.generate(loginUrl)
+  }
+  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
 .on('login'  , user => log.info('Bot', `bot login: ${user}`))
 .on('logout' , e => log.info('Bot', 'bot logout.'))
diff --git a/example/contact-bot.ts b/example/contact-bot.ts
index ded95c17e68a725a136eb31fa92b1c701b225bf4..d9fa08ea04d71d7da3bae871b9365f348c597f8b 100644
--- a/example/contact-bot.ts
+++ b/example/contact-bot.ts
@@ -6,6 +6,10 @@
  * https://github.com/wechaty/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import {
     Config
   , Contact
@@ -51,7 +55,7 @@ bot
 .on('scan', (url, code) => {
   if (!/201|200/.test(String(code))) {
     let loginUrl = url.replace(/\/qrcode\//, '/l/')
-    require('qrcode-terminal').generate(loginUrl)
+    QrcodeTerminal.generate(loginUrl)
   }
   console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
diff --git a/example/ding-dong-bot.ts b/example/ding-dong-bot.ts
index ebdf55190c01cc0de6c9553028113392b3c041dd..dbde7cefd03a1d46d439a686ed41334fb33a38f0 100644
--- a/example/ding-dong-bot.ts
+++ b/example/ding-dong-bot.ts
@@ -6,6 +6,10 @@
  * https://github.com/wechaty/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import {
   Wechaty
   , Config
@@ -45,7 +49,7 @@ bot
 .on('scan', (url, code) => {
   if (!/201|200/.test(String(code))) {
     let loginUrl = url.replace(/\/qrcode\//, '/l/')
-    require('qrcode-terminal').generate(loginUrl)
+    QrcodeTerminal.generate(loginUrl)
   }
   console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
diff --git a/example/friend-bot.ts b/example/friend-bot.ts
index 9f76a91ec70fc5639a06e4116e96ab1c76620766..9e955aac8ccf77bba72b7137018b4f928b478952 100644
--- a/example/friend-bot.ts
+++ b/example/friend-bot.ts
@@ -6,6 +6,10 @@
  * https://github.com/wechaty/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import {
   Wechaty
   , Message
@@ -47,7 +51,7 @@ bot
 .on('scan', (url, code) => {
   if (!/201|200/.test(String(code))) {
     let loginUrl = url.replace(/\/qrcode\//, '/l/')
-    require('qrcode-terminal').generate(loginUrl)
+    QrcodeTerminal.generate(loginUrl)
   }
   console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
diff --git a/example/image-bot.ts b/example/image-bot.ts
index 0b8f13e04d90e53381a8bb053315c69908d2e1ca..783b63094739e4aedab3d4510e4f68eecaf45e70 100644
--- a/example/image-bot.ts
+++ b/example/image-bot.ts
@@ -6,6 +6,10 @@
  * https://github.com/wechaty/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import {
     Message
   , Wechaty
@@ -14,7 +18,11 @@ const bot = Wechaty.instance({ profile: 'example-bot.wechaty.json' })
 
 bot
 .on('scan', (url, code) => {
-  console.log(`Use Wechat to Scan QR Code in url to login: ${code}\n${url}`)
+  if (!/201|200/.test(String(code))) {
+    let loginUrl = url.replace(/\/qrcode\//, '/l/')
+    QrcodeTerminal.generate(loginUrl)
+  }
+  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
 .on('message', m => {
   console.log(`RECV: ${m}`)
diff --git a/example/roger-bot.ts b/example/roger-bot.ts
index 73b24319c8417b420647602627f64a560a7f60bf..1b7ed53da4d9b0777a77e952c301c52c742a33ca 100644
--- a/example/roger-bot.ts
+++ b/example/roger-bot.ts
@@ -6,12 +6,20 @@
  * https://github.com/wechaty/wechaty
  *
  */
+
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import { Wechaty } from '../'
 const bot = Wechaty.instance(/* no profile here because roger bot is too noisy */)
 
 bot
 .on('scan', (url, code) => {
-  console.log(`Use Wechat to Scan QR Code in url to login: ${code}\n${url}`)
+  if (!/201|200/.test(String(code))) {
+    let loginUrl = url.replace(/\/qrcode\//, '/l/')
+    QrcodeTerminal.generate(loginUrl)
+  }
+  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
 .on('message', m => {
   if (bot.self(m)) { return }
diff --git a/example/room-bot.ts b/example/room-bot.ts
index c67adef50e123b1f2fedb3fe87ef209f56cb7941..6832e6625dbbaa58bcbedc5bbd784983a7226f55 100644
--- a/example/room-bot.ts
+++ b/example/room-bot.ts
@@ -34,6 +34,9 @@ const HELPER_CONTACT_NAME = 'Bruce LEE'
  *
  */
 
+/* tslint:disable:variable-name */
+const QrcodeTerminal = require('qrcode-terminal')
+
 import {
     Config
   , Contact
@@ -71,8 +74,12 @@ console.log(welcome)
 const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
 
 bot
-.on('scan', function(url, code) {
-  console.log(`Use Wechat to Scan QR Code in url to login: ${code}\n${url}`)
+.on('scan', (url, code) => {
+  if (!/201|200/.test(String(code))) {
+    let loginUrl = url.replace(/\/qrcode\//, '/l/')
+    QrcodeTerminal.generate(loginUrl)
+  }
+  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
 .on('logout'	, user => log.info('Bot', `${user.name()} logouted`))
 .on('error'   , e => log.info('Bot', 'error: %s', e))
diff --git a/example/tuling123-bot.ts b/example/tuling123-bot.ts
index 3990790e23144338b7975b05c5173dd910d7e906..ea0091e61457e47095d60f4fe4c67f7f8c336711 100644
--- a/example/tuling123-bot.ts
+++ b/example/tuling123-bot.ts
@@ -12,7 +12,8 @@
  */
 /* tslint:disable:no-var-requires */
 /* tslint:disable:variable-name */
-const Tuling123 = require('tuling123-client')
+const QrcodeTerminal  = require('qrcode-terminal')
+const Tuling123       = require('tuling123-client')
 
 import { EventEmitter } from 'events'
 
@@ -50,7 +51,11 @@ bot
 .on('login'  , user => log.info('Bot', `bot login: ${user}`))
 .on('logout' , e => log.info('Bot', 'bot logout.'))
 .on('scan', (url, code) => {
-  console.log(`Scan QR Code in url to login: ${code}\n${url}`)
+  if (!/201|200/.test(String(code))) {
+    let loginUrl = url.replace(/\/qrcode\//, '/l/')
+    QrcodeTerminal.generate(loginUrl)
+  }
+  console.log(`${url}\n[${code}] Scan QR Code in above url to login: `)
 })
 .on('message', async m => {
   if (m.self()) return