diff --git a/client-protocol/ApiCallbackMessage.ts b/client-protocol/ApiCallbackMessage.ts
new file mode 100644
index 0000000..dc4f58f
--- /dev/null
+++ b/client-protocol/ApiCallbackMessage.ts
@@ -0,0 +1,15 @@
+type ApiCallbackMessage = {
+    msg: string,
+    /**
+     * 200: 成功
+     * 400: 伺服器端無法理解客戶端請求
+     * 401: 需要身份驗證
+     * 403: 伺服器端拒絕執行客戶端請求
+     * 404: Not Found
+     * 500: 伺服器端錯誤
+     * 501: 伺服器端不支持請求的功能
+     */
+    code: 200 | 400 | 401 | 403 | 404 | 500 | 501 | -1,
+    data?: { [key: string]: unknown },
+}
+export default ApiCallbackMessage
diff --git a/client-protocol/ApiDeclare.ts b/client-protocol/ApiDeclare.ts
new file mode 100644
index 0000000..6245120
--- /dev/null
+++ b/client-protocol/ApiDeclare.ts
@@ -0,0 +1,47 @@
+export type CallMethod = 
+    "User.auth" |
+    "User.register" |
+    "User.login" |
+    "User.refreshAccessToken" |
+
+    "User.setAvatar" |
+    "User.updateProfile" |
+    "User.getMyInfo" |
+    "User.resetPassword" |
+
+    "User.getInfo" |
+
+    "User.getMyContacts" |
+    "User.addContacts" |
+    "User.removeContacts" |
+
+    "User.getMyRecentChats" | 
+
+    "Chat.getInfo" |
+    
+    "Chat.updateSettings" |
+    "Chat.setAvatar" |
+
+    "Chat.createGroup" |
+
+    "Chat.getIdForPrivate" |
+    "Chat.getAnotherUserIdFromPrivate" |
+
+    "Chat.processJoinRequest" |
+    "Chat.sendJoinRequest" |
+    "Chat.getJoinRequests" |
+
+    "Chat.sendMessage" |
+    "Chat.getMessageHistory" |
+
+    "Chat.uploadFile"
+
+export type ClientEvent = 
+    "Client.onMessage"
+
+export const CallableMethodBeforeAuth = [
+    "User.auth",
+    "User.register",
+    "User.login",
+    "User.refreshAccessToken",
+]
\ No newline at end of file
diff --git a/client-protocol/BaseClientObject.ts b/client-protocol/BaseClientObject.ts
new file mode 100644
index 0000000..2cf510d
--- /dev/null
+++ b/client-protocol/BaseClientObject.ts
@@ -0,0 +1,8 @@
+import LingChairClient from "./LingChairClient.ts"
+
+export default class BaseClientObject {
+    declare client: LingChairClient
+    constructor(client: LingChairClient) {
+        this.client = client
+    }
+}
\ No newline at end of file
diff --git a/client-protocol/CallbackError.ts b/client-protocol/CallbackError.ts
new file mode 100644
index 0000000..c681760
--- /dev/null
+++ b/client-protocol/CallbackError.ts
@@ -0,0 +1,7 @@
+import ApiCallbackMessage from "./ApiCallbackMessage.ts"
+
+export default class CallbackError extends Error {
+    constructor(re: ApiCallbackMessage) {
+        super(`[${re.code}] ${re.msg}${re.data ? ` (data: ${JSON.stringify(re.data)})` : ''}`)
+    }
+}
\ No newline at end of file
diff --git a/client-protocol/LingChairClient.ts b/client-protocol/LingChairClient.ts
new file mode 100644
index 0000000..cd663a8
--- /dev/null
+++ b/client-protocol/LingChairClient.ts
@@ -0,0 +1,114 @@
+// deno-lint-ignore-file no-explicit-any
+import { io, ManagerOptions, Socket, SocketOptions } from 'socket.io-client'
+import crypto from 'node:crypto'
+import { CallMethod, ClientEvent } from './ApiDeclare.ts'
+import ApiCallbackMessage from './ApiCallbackMessage.ts'
+import User from "./User.ts"
+import UserMySelf from "./UserMySelf.ts"
+
+export { 
+    User,
+    UserMySelf,
+}
+
+export default class LingChairClient {
+    declare client: Socket
+    declare access_token: string
+    declare refresh_token?: string
+    constructor(args: {
+        server_url: string
+        device_id: string,
+        io?: Partial<ManagerOptions & SocketOptions>
+    }) {
+        this.client = io(args.server_url, {
+            transports: ["polling", "websocket", "webtransport"],
+            ...args.io,
+            auth: {
+                ...args.io?.auth,
+                device_id: args.device_id,
+                session_id: crypto.randomUUID(),
+            },
+        })
+        this.client.on("The_White_Silk", (name: string, data: unknown, _callback: (ret: unknown) => void) => {
+            try {
+                if (name == null || data == null) return
+                this.events[name]?.forEach((v) => v(data))
+            } catch (e) {
+                console.error(e)
+            }
+        })
+    }
+    connect() {
+        this.client.connect()
+    }
+    disconnect() {
+        this.client.disconnect()
+    }
+    reconnect() {
+        this.disconnect()
+        this.connect()
+    }
+    invoke(method: CallMethod, args: object = {}, timeout: number = 10000): Promise<ApiCallbackMessage> {
+        return new Promise((resolve) => {
+            this.client!.timeout(timeout).emit("The_White_Silk", method, args, (err: Error, res: ApiCallbackMessage) => {
+                // 错误处理
+                if (err) return resolve({
+                    code: -1,
+                    msg: err.message,
+                })
+                resolve(res)
+            })
+        })
+    }
+    events: { [key: string]: ((data: any) => void)[] } = {}
+    on(eventName: ClientEvent, func: (data: any) => void) {
+        if (this.events[eventName] == null)
+            this.events[eventName] = []
+        if (this.events[eventName].indexOf(func) == -1)
+            this.events[eventName].push(func)
+    }
+    off(eventName: ClientEvent, func: (data: any) => void) {
+        if (this.events[eventName] == null)
+            this.events[eventName] = []
+        const index = this.events[eventName].indexOf(func)
+        if (index != -1)
+            this.events[eventName].splice(index, 1)
+    }
+    async auth(args: {
+        refresh_token?: string,
+        access_token?: string,
+        account?: string,
+        password?: string,
+    }) {
+        if ((!args.access_token && !args.refresh_token) && (!args.account && !args.password))
+            throw new Error('Access/Refresh token or account & password required')
+
+        this.refresh_token = args.refresh_token
+
+        let access_token = args.access_token
+        if (!access_token && args.refresh_token) {
+            const re = await this.invoke('User.refreshAccessToken', {
+                refresh_token: args.refresh_token,
+            })
+            if (re.code == 200) {
+                access_token = re.data!.access_token as string | undefined
+            } else return re
+        }
+
+        if (!access_token && (args.account && args.password)) {
+            const re = await this.invoke('User.login', {
+                account: args.account,
+                password: crypto.createHash('sha256').update(args.password).digest('hex'),
+            })
+            if (re.code == 200) {
+                access_token = re.data!.access_token as string | undefined
+            } else return re
+        }
+
+        const re = await this.invoke('User.auth', {
+            access_token: access_token
+        })
+        if (re.code == 200) this.access_token = access_token as string
+        return re
+    }
+}
diff --git a/client-protocol/User.ts b/client-protocol/User.ts
new file mode 100644
index 0000000..216a999
--- /dev/null
+++ b/client-protocol/User.ts
@@ -0,0 +1,50 @@
+import BaseClientObject from "./BaseClientObject.ts"
+import UserBean from "./bean/UserBean.ts"
+import CallbackError from "./CallbackError.ts"
+import LingChairClient from "./LingChairClient.ts"
+
+export default class User extends BaseClientObject {
+    declare bean: UserBean
+    constructor(client: LingChairClient, bean: UserBean) {
+        super(client)
+        this.bean = bean
+    }
+    /*
+     * ================================================
+     *                    实例化方法
+     * ================================================
+     */
+    static async getById(client: LingChairClient, id: string) {
+        try {
+            return await this.getByIdOrThrow(client, id)
+        } catch(_) {
+            return null
+        }
+    }
+    static async getByIdOrThrow(client: LingChairClient, id: string) {
+        const re = await client.invoke("User.getInfo", {
+            token: client.access_token,
+            target: id,
+        })
+        if (re.code == 200)
+            return new User(client, re.data as unknown as UserBean)
+        throw new CallbackError(re)
+    }
+    /*
+     * ================================================
+     *                    基本 Bean
+     * ================================================
+     */
+    getId() {
+        return this.bean.id
+    }
+    getUserName() {
+        return this.bean.username
+    }
+    getNickName() {
+        return this.bean.nickname
+    }
+    getAvatarFileHash() {
+        return this.bean.avatar_file_hash
+    }
+}
diff --git a/client-protocol/UserMySelf.ts b/client-protocol/UserMySelf.ts
new file mode 100644
index 0000000..cb130e1
--- /dev/null
+++ b/client-protocol/UserMySelf.ts
@@ -0,0 +1,177 @@
+import CallbackError from "./CallbackError.ts"
+import LingChairClient from "./LingChairClient.ts"
+import User from "./User.ts"
+import ChatBean from "./bean/ChatBean.ts"
+import RecentChatBean from "./bean/RecentChatBean.ts"
+import UserBean from "./bean/UserBean.ts"
+
+export default class UserMySelf extends User {
+    /*
+     * ================================================
+     *                    实例化方法
+     * ================================================
+     */
+    static async getMySelf(client: LingChairClient) {
+        try {
+            return await this.getMySelfOrThrow(client)
+        } catch (_) {
+            return null
+        }
+    }
+    static async getMySelfOrThrow(client: LingChairClient) {
+        const re = await client.invoke("User.getMyInfo", {
+            token: client.access_token,
+        })
+        if (re.code == 200)
+            return new UserMySelf(client, re.data as unknown as UserBean)
+        throw new CallbackError(re)
+    }
+    /*
+     * ================================================
+     *                    账号相关
+     * ================================================
+     */
+    async resetPassword(old_password: string, new_password: string) {
+        try {
+            await this.resetPasswordOrThrow(old_password, new_password)
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+    async resetPasswordOrThrow(old_password: string, new_password: string) {
+        const re = await this.client.invoke("User.resetPassword", {
+            token: this.client.access_token,
+            old_password, 
+            new_password,
+        })
+        if (re.code != 200) throw new CallbackError(re)
+    }
+    /*
+     * ================================================
+     *                    个人资料
+     * ================================================
+     */
+    async setAvatarFileHash(file_hash: string) {
+        try {
+            await this.setAvatarFileHashOrThrow(file_hash)
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+    async setAvatarFileHashOrThrow(file_hash: string) {
+        const re = await this.client.invoke("User.setAvatar", {
+            token: this.client.access_token,
+            file_hash,
+        })
+        if (re.code != 200) throw new CallbackError(re)
+    }
+    async setUserName(user_name: string) {
+        return await this.updateProfile({ username: user_name })
+    }
+    async setUserNameOrThrow(user_name: string) {
+        await this.updateProfileOrThrow({ username: user_name })
+    }
+    async setNickName(nick_name: string) {
+        return await this.updateProfile({ nickname: nick_name })
+    }
+    async setNickNameOrThrow(nick_name: string) {
+        await this.updateProfileOrThrow({ nickname: nick_name })
+    }
+    async updateProfile(args: {
+        username?: string,
+        nickname?: string
+    }) {
+        try {
+            await this.updateProfileOrThrow(args)
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+    async updateProfileOrThrow({
+        username,
+        nickname
+    }: {
+        username?: string,
+        nickname?: string
+    }) {
+        const re = await this.client.invoke("User.updateProfile", {
+            token: this.client.access_token,
+            nickname,
+            username,
+        })
+        if (re.code != 200) throw new CallbackError(re)
+    }
+    /*
+     * ================================================
+     *                    收藏对话
+     * ================================================
+     */
+    async addFavouriteChats(chat_ids: string[]) {
+        try {
+            await this.addFavouriteChatsOrThrow(chat_ids)
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+    async addFavouriteChatsOrThrow(chat_ids: string[]) {
+        const re = await this.client.invoke("User.addContacts", {
+            token: this.client.access_token,
+            targets: chat_ids,
+        })
+        if (re.code != 200) throw new CallbackError(re)
+    }
+    async removeFavouriteChats(chat_ids: string[]) {
+        try {
+            await this.removeFavouriteChatsOrThrow(chat_ids)
+            return true
+        } catch (_) {
+            return false
+        }
+    }
+    async removeFavouriteChatsOrThrow(chat_ids: string[]) {
+        const re = await this.client.invoke("User.removeContacts", {
+            token: this.client.access_token,
+            targets: chat_ids,
+        })
+        if (re.code != 200) throw new CallbackError(re)
+    }
+    async getMyFavouriteChatBeans() {
+        try {
+            return await this.getMyFavouriteChatBeansOrThrow()
+        } catch (_) {
+            return null
+        }
+    }
+    async getMyFavouriteChatBeansOrThrow() {
+        const re = await this.client.invoke("User.getMyContacts", {
+            token: this.client.access_token
+        })
+        if (re.code == 200)
+            return re.data!.recent_chats as ChatBean[]
+        throw new CallbackError(re)
+    }
+    /*
+     * ================================================
+     *                    最近对话
+     * ================================================
+     */
+    async getMyRecentChatBeans() {
+        try {
+            return await this.getMyRecentChatBeansOrThrow()
+        } catch (_) {
+            return null
+        }
+    }
+    async getMyRecentChatBeansOrThrow() {
+        const re = await this.client.invoke("User.getMyRecentChats", {
+            token: this.client.access_token
+        })
+        if (re.code == 200)
+            return re.data!.recent_chats as RecentChatBean[]
+        throw new CallbackError(re)
+    }
+}
diff --git a/client-protocol/bean/ChatBean.ts b/client-protocol/bean/ChatBean.ts
new file mode 100644
index 0000000..4b1de08
--- /dev/null
+++ b/client-protocol/bean/ChatBean.ts
@@ -0,0 +1,14 @@
+import ChatType from "./ChatType.ts"
+
+export default class ChatBean {
+    declare type: ChatType
+    declare id: string
+    declare title: string
+    declare avatar_file_hash?: string
+    declare settings?: { [key: string]: unknown }
+
+    declare is_member: boolean
+    declare is_admin: boolean
+
+    [key: string]: unknown
+}
diff --git a/client-protocol/bean/ChatType.ts b/client-protocol/bean/ChatType.ts
new file mode 100644
index 0000000..0ac05ed
--- /dev/null
+++ b/client-protocol/bean/ChatType.ts
@@ -0,0 +1,3 @@
+type ChatType = 'private' | 'group'
+
+export default ChatType
diff --git a/client-protocol/bean/GroupSettingsBean.ts b/client-protocol/bean/GroupSettingsBean.ts
new file mode 100644
index 0000000..3adface
--- /dev/null
+++ b/client-protocol/bean/GroupSettingsBean.ts
@@ -0,0 +1,14 @@
+interface GroupSettingsBean {
+    allow_new_member_join?: boolean
+    allow_new_member_from_invitation?: boolean
+    new_member_join_method?: 'disabled' | 'allowed_by_admin' | 'answered_and_allowed_by_admin'
+    answered_and_allowed_by_admin_question?: string
+
+    // 下面两个比较特殊, 由服务端给予
+    group_title: string
+    group_name: string
+
+    [key: string]: unknown
+}
+
+export default GroupSettingsBean
diff --git a/client-protocol/bean/JoinRequestBean.ts b/client-protocol/bean/JoinRequestBean.ts
new file mode 100644
index 0000000..eae0966
--- /dev/null
+++ b/client-protocol/bean/JoinRequestBean.ts
@@ -0,0 +1,8 @@
+export default class JoinRequestBean {
+    declare user_id: string
+    declare title: string
+    declare avatar?: string
+    declare reason?: string
+
+    [key: string]: unknown
+}
diff --git a/client-protocol/bean/MessageBean.ts b/client-protocol/bean/MessageBean.ts
new file mode 100644
index 0000000..ab89417
--- /dev/null
+++ b/client-protocol/bean/MessageBean.ts
@@ -0,0 +1,6 @@
+export default class MessageBean {
+    declare id: number
+    declare text: string
+    declare user_id: string
+    declare time: string
+}
diff --git a/client-protocol/bean/RecentChatBean.ts b/client-protocol/bean/RecentChatBean.ts
new file mode 100644
index 0000000..2d6d455
--- /dev/null
+++ b/client-protocol/bean/RecentChatBean.ts
@@ -0,0 +1,5 @@
+import ChatBean from "./ChatBean.ts"
+
+export default class RecentChat extends ChatBean {
+    declare content: string
+}
diff --git a/client-protocol/bean/UserBean.ts b/client-protocol/bean/UserBean.ts
new file mode 100644
index 0000000..75ce4ee
--- /dev/null
+++ b/client-protocol/bean/UserBean.ts
@@ -0,0 +1,6 @@
+export default class UserBean {
+    declare id: string
+    declare username?: string
+    declare nickname: string
+    declare avatar_file_hash?: string
+}
\ No newline at end of file
diff --git a/client-protocol/deno.jsonc b/client-protocol/deno.jsonc
new file mode 100644
index 0000000..4cdc1bc
--- /dev/null
+++ b/client-protocol/deno.jsonc
@@ -0,0 +1,5 @@
+{
+    "imports": {
+        "socket.io-client": "npm:socket.io-client@4.8.1"
+    }
+}
\ No newline at end of file
diff --git a/client-protocol/test.ts b/client-protocol/test.ts
new file mode 100644
index 0000000..5632261
--- /dev/null
+++ b/client-protocol/test.ts
@@ -0,0 +1,15 @@
+import LingChairClient, { User, UserMySelf } from "./LingChairClient.ts"
+import OnMessageData from "./type/OnMessageData.ts"
+
+const client = new LingChairClient({
+    server_url: 'ws://localhost:3601',
+    device_id: 'test01'
+})
+await client.auth({
+    account: '满月',
+    password: '满月',
+})
+client.on('Client.onMessage', (data: OnMessageData) => {
+    console.log(data)
+})
+console.log(await (await UserMySelf.getMySelf(client))?.getMyRecentChatBeans())
diff --git a/client-protocol/type/OnMessageData.ts b/client-protocol/type/OnMessageData.ts
new file mode 100644
index 0000000..273bcb3
--- /dev/null
+++ b/client-protocol/type/OnMessageData.ts
@@ -0,0 +1,8 @@
+import MessageBean from '../bean/MessageBean.ts'
+
+interface OnMessageData {
+    chat: string
+    msg: MessageBean
+}
+
+export default OnMessageData