diff --git a/server/data/Chat.ts b/server/data/Chat.ts
index 25b5db0..bb4c7e2 100644
--- a/server/data/Chat.ts
+++ b/server/data/Chat.ts
@@ -10,7 +10,6 @@ import User from "./User.ts"
 import ChatType from "./ChatType.ts"
 import UserChatLinker from "./UserChatLinker.ts"
 import DataWrongError from '../api/DataWrongError.ts'
-import ChatAdminLinker from "./ChatAdminLinker.ts"
 
 /**
  * Chat.ts - Wrapper and manager
@@ -31,6 +30,14 @@ export default class Chat {
                 /* 头像 */ avatar BLOB,
                 /* 设置 */ settings TEXT NOT NULL
             );
+       `)
+       db.exec(`
+            CREATE TABLE IF NOT EXISTS ChatAdmin (
+                /* 序号 */ count INTEGER PRIMARY KEY AUTOINCREMENT,
+                /* 用戶 ID */ user_id TEXT NOT NULL,
+                /* Chat ID */ chat_id TEXT NOT NULL,
+                /* 管理权限 */ permissions TEXT NOT NULL
+            );
        `)
         return db
     }
@@ -82,14 +89,38 @@ export default class Chat {
     }
 
     addAdmin(userId: string, permission: string[] | string) {
-        ChatAdminLinker.linkAdminAndChat(userId, this.bean.id)
+        if (!this.checkUserIsAdmin(userId))
+            Chat.database.prepare(`INSERT INTO ChatAdmin (
+                user_id,
+                chat_id,
+                permissions
+            ) VALUES (?, ?, ?);`).run(
+                userId,
+                this.bean.id,
+                '[]'
+            )
         this.setAdminPermissions(userId, permission)
     }
+
+    checkUserIsAdmin(userId: string) {
+        return Chat.findAllAdminsByCondition('user_id = ? AND chat_id = ?', userId, this.bean.id).length != 0
+    }
+    getAdmins() {
+        return Chat.findAllAdminsByCondition('chat_id = ?', this.bean.id).map((v) => v.user_id) as string[]
+    }
+    protected static findAllAdminsByCondition(condition: string, ...args: SQLInputValue[]) {
+        return this.database.prepare(`SELECT * FROM ChatAdmin WHERE ${condition}`).all(...args)
+    }
+
     setAdminPermissions(userId: string, permission: string[] | string) {
-        ChatAdminLinker.updatePermissions(userId, this.bean.id, permission instanceof Array ? JSON.stringify(permission) : permission)
+        Chat.database.prepare(`UPDATE ChatAdmin SET permissions = ? WHERE user_id = ? AND chat_id = ?`).run(
+            userId, 
+            this.bean.id,
+             permission instanceof Array ? JSON.stringify(permission) : permission
+        )
     }
     removeAdmins(userIds: string[]) {
-        userIds.forEach((v) => ChatAdminLinker.unlinkAdminAndChat(v, this.bean.id))
+        userIds.forEach((v) => Chat.database.prepare(`DELETE FROM ChatAdmin WHERE user_id = ? AND chat_id = ?`).run(v, this.bean.id))
     }
     getMembersList() {
         return UserChatLinker.getChatMembers(this.bean.id)
diff --git a/server/data/ChatAdminLinker.ts b/server/data/ChatAdminLinker.ts
deleted file mode 100644
index 9b236a3..0000000
--- a/server/data/ChatAdminLinker.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import { DatabaseSync } from "node:sqlite"
-import path from 'node:path'
-
-import config from "../config.ts"
-import { SQLInputValue } from "node:sqlite"
-export default class ChatAdminLinker {
-    static database: DatabaseSync = this.init()
-
-    private static init(): DatabaseSync {
-        const db: DatabaseSync = new DatabaseSync(path.join(config.data_path, 'ChatAdminLinker.db'))
-        db.exec(`
-            CREATE TABLE IF NOT EXISTS ChatAdminLinker (
-                /* 序号 */ count INTEGER PRIMARY KEY AUTOINCREMENT,
-                /* 用戶 ID */ user_id TEXT NOT NULL,
-                /* Chat ID */ chat_id TEXT NOT NULL,
-                /* 管理权限 */ permissions TEXT NOT NULL
-            );
-       `)
-        return db
-    }
-
-    static linkAdminAndChat(userId: string, chatId: string) {
-        if (!this.checkAdminIsLinkedToChat(userId, chatId))
-            this.database.prepare(`INSERT INTO ChatAdminLinker (
-                user_id,
-                chat_id,
-                permissions
-            ) VALUES (?, ?, ?);`).run(
-                userId,
-                chatId,
-                '[]'
-            )
-    }
-    static updatePermissions(userId: string, chatId: string, permissions: string) {
-        this.database.prepare(`UPDATE ChatAdminLinker SET permissions = ? WHERE user_id = ? AND chat_id = ?`).run(permissions, userId, chatId)
-    }
-    static unlinkAdminAndChat(userId: string, chatId: string) {
-        this.database.prepare(`DELETE FROM ChatAdminLinker WHERE user_id = ? AND chat_id = ?`).run(userId, chatId)
-    }
-    static checkAdminIsLinkedToChat(userId: string, chatId: string) {
-        return this.findAllByCondition('user_id = ? AND chat_id = ?', userId, chatId).length != 0
-    }
-    static getChatAdmins(chatId: string) {
-        return this.findAllByCondition('chat_id = ?', chatId).map((v) => v.user_id) as string[]
-    }
-    protected static findAllByCondition(condition: string, ...args: SQLInputValue[]) {
-        return this.database.prepare(`SELECT * FROM ChatAdminLinker WHERE ${condition}`).all(...args)
-    }
-}