diff --git a/package.json b/package.json
index d4af7128e3580991f03d9d7d7ccd2731db141b19..346737f5d57fde07d839abc6b1c3bee87d9a5d39 100644
--- a/package.json
+++ b/package.json
@@ -128,7 +128,7 @@
     "gl-matrix": "^2.6.1",
     "glob": "^7.1.0",
     "jsdoc-to-markdown": "^4.0.0",
-    "markdownlint-cli": "^0.11.0",
+    "markdownlint-cli": "^0.12.0",
     "nyc": "^12.0.1",
     "qrcode-terminal": "^0.12.0",
     "request": "^2.87.0",
diff --git a/src/user/room.ts b/src/user/room.ts
index d912cf060297961b2e531b2e8f127e293e63af01..49f98bb1665e3b770e49db42c7194ae94f664bcd 100644
--- a/src/user/room.ts
+++ b/src/user/room.ts
@@ -486,7 +486,7 @@ export class Room extends Accessory implements Sayable {
    * // after logged in...
    * const room = await bot.Room.find({topic: 'topic of your room'}) // change `event-room` to any room topic in your wechat
    * if (room) {
-   *   room.on('join', (room: Room, inviteeList: Contact[], inviter: Contact) => {
+   *   room.on('join', (room, inviteeList, inviter) => {
    *     const nameList = inviteeList.map(c => c.name()).join(',')
    *     console.log(`Room got new member ${nameList}, invited by ${inviter}`)
    *   })
@@ -498,7 +498,7 @@ export class Room extends Accessory implements Sayable {
    * // after logged in...
    * const room = await bot.Room.find({topic: 'topic of your room'}) // change `event-room` to any room topic in your wechat
    * if (room) {
-   *   room.on('leave', (room: Room, leaverList: Contact[]) => {
+   *   room.on('leave', (room, leaverList) => {
    *     const nameList = leaverList.map(c => c.name()).join(',')
    *     console.log(`Room lost member ${nameList}`)
    *   })
@@ -510,7 +510,7 @@ export class Room extends Accessory implements Sayable {
    * // after logged in...
    * const room = await bot.Room.find({topic: 'topic of your room'}) // change `event-room` to any room topic in your wechat
    * if (room) {
-   *   room.on('topic', (room: Room, topic: string, oldTopic: string, changer: Contact) => {
+   *   room.on('topic', (room, topic, oldTopic, changer) => {
    *     console.log(`Room topic changed from ${oldTopic} to ${topic} by ${changer.name()}`)
    *   })
    * }
diff --git a/src/wechaty.ts b/src/wechaty.ts
index 285958d92b83bbd279c0f59f5f318ed378c2f4c2..45cfc80cd93fe068857662a68954a4e7aa43cfa4 100644
--- a/src/wechaty.ts
+++ b/src/wechaty.ts
@@ -380,35 +380,35 @@ export class Wechaty extends Accessory implements Sayable {
    * @example <caption>Event:scan</caption>
    * // Scan Event will emit when the bot needs to show you a QR Code for scanning
    *
-   * bot.on('scan', (url: string, code: number) => {
+   * bot.on('scan', (url, code) => {
    *   console.log(`[${code}] Scan ${url} to login.` )
    * })
    *
    * @example <caption>Event:login </caption>
    * // Login Event will emit when bot login full successful.
    *
-   * bot.on('login', (user: ContactSelf) => {
+   * bot.on('login', (user) => {
    *   console.log(`user ${user} login`)
    * })
    *
    * @example <caption>Event:logout </caption>
    * // Logout Event will emit when bot detected log out.
    *
-   * bot.on('logout', (user: ContactSelf) => {
+   * bot.on('logout', (user) => {
    *   console.log(`user ${user} logout`)
    * })
    *
    * @example <caption>Event:message </caption>
    * // Message Event will emit when there's a new message.
    *
-   * wechaty.on('message', (message: Message) => {
+   * wechaty.on('message', (message) => {
    *   console.log(`message ${message} received`)
    * })
    *
    * @example <caption>Event:friendship </caption>
    * // Friendship Event will emit when got a new friend request, or friendship is confirmed.
    *
-   * bot.on('friendship', (friendship: Friendship) => {
+   * bot.on('friendship', (friendship) => {
    *   if(friendship.type() === Friendship.Type.RECEIVE){ // 1. receive new friendship request from new contact
    *     const contact = friendship.contact()
    *     let result = await friendship.accept()
@@ -425,7 +425,7 @@ export class Wechaty extends Accessory implements Sayable {
    * @example <caption>Event:room-join </caption>
    * // room-join Event will emit when someone join the room.
    *
-   * bot.on('room-join', (room: Room, inviteeList: Contact[], inviter: Contact) => {
+   * bot.on('room-join', (room, inviteeList, inviter) => {
    *   const nameList = inviteeList.map(c => c.name()).join(',')
    *   console.log(`Room ${room.topic()} got new member ${nameList}, invited by ${inviter}`)
    * })
@@ -433,7 +433,7 @@ export class Wechaty extends Accessory implements Sayable {
    * @example <caption>Event:room-leave </caption>
    * // room-leave Event will emit when someone leave the room.
    *
-   * bot.on('room-leave', (room: Room, leaverList: Contact[]) => {
+   * bot.on('room-leave', (room, leaverList) => {
    *   const nameList = leaverList.map(c => c.name()).join(',')
    *   console.log(`Room ${room.topic()} lost member ${nameList}`)
    * })
@@ -441,7 +441,7 @@ export class Wechaty extends Accessory implements Sayable {
    * @example <caption>Event:room-topic </caption>
    * // room-topic Event will emit when someone change the room's topic.
    *
-   * bot.on('room-topic', (room: Room, topic: string, oldTopic: string, changer: Contact) => {
+   * bot.on('room-topic', (room, topic, oldTopic, changer) => {
    *   console.log(`Room ${room.topic()} topic changed from ${oldTopic} to ${topic} by ${changer.name()}`)
    * })
    *