diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..96a084f
Binary files /dev/null and b/.DS_Store differ
diff --git a/app/api/endpoints/auth.py b/app/api/endpoints/auth.py
new file mode 100644
index 0000000..a8cab44
--- /dev/null
+++ b/app/api/endpoints/auth.py
@@ -0,0 +1,37 @@
+
+from fastapi import APIRouter, HTTPException
+from app.models.models import LoginRequest, LoginResponse
+from app.core.database import get_db_connection
+import hashlib
+import datetime
+
+router = APIRouter()
+
+def hash_password(password: str) -> str:
+    return hashlib.sha256(password.encode()).hexdigest()
+
+@router.post("/auth/login", response_model=LoginResponse)
+def login(request: LoginRequest):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        query = "SELECT user_id, username, caption, email, password_hash FROM users WHERE username = %s"
+        cursor.execute(query, (request.username,))
+        user = cursor.fetchone()
+        
+        if not user:
+            raise HTTPException(status_code=401, detail="用户名或密码错误")
+        
+        hashed_input = hash_password(request.password)
+        if user['password_hash'] != hashed_input and user['password_hash'] != request.password:
+            raise HTTPException(status_code=401, detail="用户名或密码错误")
+        
+        token = f"token_{user['user_id']}_{hash_password(str(datetime.datetime.now()))[:16]}"
+        
+        return LoginResponse(
+            user_id=user['user_id'],
+            username=user['username'],
+            caption=user['caption'],
+            email=user['email'],
+            token=token
+        )
diff --git a/app/api/endpoints/meetings.py b/app/api/endpoints/meetings.py
new file mode 100644
index 0000000..bf3e8ec
--- /dev/null
+++ b/app/api/endpoints/meetings.py
@@ -0,0 +1,394 @@
+
+from fastapi import APIRouter, HTTPException, UploadFile, File, Form
+from app.models.models import Meeting, TranscriptSegment, CreateMeetingRequest, UpdateMeetingRequest
+from app.core.database import get_db_connection
+from app.core.config import UPLOAD_DIR, AUDIO_DIR, ALLOWED_EXTENSIONS, MAX_FILE_SIZE
+from typing import Optional
+import os
+import uuid
+import shutil
+
+router = APIRouter()
+
+@router.get("/meetings", response_model=list[Meeting])
+def get_meetings(user_id: Optional[int] = None):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        base_query = '''
+            SELECT 
+                m.meeting_id, m.title, m.meeting_time, m.summary, m.created_at, 
+                m.user_id as creator_id, u.caption as creator_username
+            FROM meetings m
+            JOIN users u ON m.user_id = u.user_id
+        '''
+        
+        if user_id:
+            query = f'''
+            {base_query}
+            LEFT JOIN attendees a ON m.meeting_id = a.meeting_id
+            WHERE m.user_id = %s OR a.user_id = %s
+            GROUP BY m.meeting_id
+            ORDER BY m.meeting_time DESC, m.created_at DESC
+            '''
+            cursor.execute(query, (user_id, user_id))
+        else:
+            query = f" {base_query} ORDER BY m.meeting_time DESC, m.created_at DESC"
+            cursor.execute(query)
+        
+        meetings = cursor.fetchall()
+        
+        meeting_list = []
+        for meeting in meetings:
+            attendees_query = '''
+            SELECT u.user_id, u.caption
+            FROM attendees a
+            JOIN users u ON a.user_id = u.user_id
+            WHERE a.meeting_id = %s
+            '''
+            cursor.execute(attendees_query, (meeting['meeting_id'],))
+            attendees_data = cursor.fetchall()
+            attendees = [{'user_id': row['user_id'], 'caption': row['caption']} for row in attendees_data]
+            
+            meeting_list.append(Meeting(
+                meeting_id=meeting['meeting_id'],
+                title=meeting['title'],
+                meeting_time=meeting['meeting_time'],
+                summary=meeting['summary'],
+                created_at=meeting['created_at'],
+                attendees=attendees,
+                creator_id=meeting['creator_id'],
+                creator_username=meeting['creator_username']
+            ))
+        
+        return meeting_list
+
+@router.get("/meetings/{meeting_id}", response_model=Meeting)
+def get_meeting_details(meeting_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        query = '''
+            SELECT 
+                m.meeting_id, m.title, m.meeting_time, m.summary, m.created_at, 
+                m.user_id as creator_id, u.caption as creator_username,
+                af.file_path as audio_file_path
+            FROM meetings m
+            JOIN users u ON m.user_id = u.user_id
+            LEFT JOIN audio_files af ON m.meeting_id = af.meeting_id
+            WHERE m.meeting_id = %s
+        '''
+        cursor.execute(query, (meeting_id,))
+        meeting = cursor.fetchone()
+
+        if not meeting:
+            raise HTTPException(status_code=404, detail="Meeting not found")
+
+        attendees_query = '''
+        SELECT u.user_id, u.caption
+        FROM attendees a
+        JOIN users u ON a.user_id = u.user_id
+        WHERE a.meeting_id = %s
+        '''
+        cursor.execute(attendees_query, (meeting['meeting_id'],))
+        attendees_data = cursor.fetchall()
+        attendees = [{'user_id': row['user_id'], 'caption': row['caption']} for row in attendees_data]
+
+        meeting_data = Meeting(
+            meeting_id=meeting['meeting_id'],
+            title=meeting['title'],
+            meeting_time=meeting['meeting_time'],
+            summary=meeting['summary'],
+            created_at=meeting['created_at'],
+            attendees=attendees,
+            creator_id=meeting['creator_id'],
+            creator_username=meeting['creator_username']
+        )
+        
+        # Add audio file path if exists
+        if meeting['audio_file_path']:
+            meeting_data.audio_file_path = meeting['audio_file_path']
+        
+        return meeting_data
+
+@router.get("/meetings/{meeting_id}/transcript", response_model=list[TranscriptSegment])
+def get_meeting_transcript(meeting_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # First check if meeting exists
+        meeting_query = "SELECT meeting_id FROM meetings WHERE meeting_id = %s"
+        cursor.execute(meeting_query, (meeting_id,))
+        if not cursor.fetchone():
+            raise HTTPException(status_code=404, detail="Meeting not found")
+        
+        # Get transcript segments
+        transcript_query = '''
+            SELECT segment_id, meeting_id, speaker_tag, start_time_ms, end_time_ms, text_content
+            FROM transcript_segments 
+            WHERE meeting_id = %s 
+            ORDER BY start_time_ms ASC
+        '''
+        cursor.execute(transcript_query, (meeting_id,))
+        segments = cursor.fetchall()
+        
+        return [TranscriptSegment(**segment) for segment in segments]
+
+@router.post("/meetings")
+def create_meeting(meeting_request: CreateMeetingRequest):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # Create meeting
+        meeting_query = '''
+            INSERT INTO meetings (user_id, title, meeting_time, summary)
+            VALUES (%s, %s, %s, %s)
+        '''
+        # Note: You'll need to pass user_id, for now using hardcoded value
+        cursor.execute(meeting_query, (1, meeting_request.title, meeting_request.meeting_time, None))
+        meeting_id = cursor.lastrowid
+        
+        # Add attendees
+        for attendee_id in meeting_request.attendee_ids:
+            attendee_query = '''
+                INSERT INTO attendees (meeting_id, user_id)
+                VALUES (%s, %s)
+                ON DUPLICATE KEY UPDATE meeting_id = meeting_id
+            '''
+            cursor.execute(attendee_query, (meeting_id, attendee_id))
+        
+        connection.commit()
+        return {"meeting_id": meeting_id, "message": "Meeting created successfully"}
+
+@router.put("/meetings/{meeting_id}")
+def update_meeting(meeting_id: int, meeting_request: UpdateMeetingRequest):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # Check if meeting exists
+        cursor.execute("SELECT meeting_id FROM meetings WHERE meeting_id = %s", (meeting_id,))
+        if not cursor.fetchone():
+            raise HTTPException(status_code=404, detail="Meeting not found")
+        
+        # Update meeting
+        update_query = '''
+            UPDATE meetings 
+            SET title = %s, meeting_time = %s, summary = %s
+            WHERE meeting_id = %s
+        '''
+        cursor.execute(update_query, (
+            meeting_request.title, 
+            meeting_request.meeting_time, 
+            meeting_request.summary,
+            meeting_id
+        ))
+        
+        # Update attendees - remove existing ones and add new ones
+        cursor.execute("DELETE FROM attendees WHERE meeting_id = %s", (meeting_id,))
+        
+        for attendee_id in meeting_request.attendee_ids:
+            attendee_query = '''
+                INSERT INTO attendees (meeting_id, user_id)
+                VALUES (%s, %s)
+            '''
+            cursor.execute(attendee_query, (meeting_id, attendee_id))
+        
+        connection.commit()
+        return {"message": "Meeting updated successfully"}
+
+@router.delete("/meetings/{meeting_id}")
+def delete_meeting(meeting_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # Check if meeting exists
+        cursor.execute("SELECT meeting_id FROM meetings WHERE meeting_id = %s", (meeting_id,))
+        if not cursor.fetchone():
+            raise HTTPException(status_code=404, detail="Meeting not found")
+        
+        # Delete related records first (foreign key constraints)
+        cursor.execute("DELETE FROM transcript_segments WHERE meeting_id = %s", (meeting_id,))
+        cursor.execute("DELETE FROM audio_files WHERE meeting_id = %s", (meeting_id,))
+        cursor.execute("DELETE FROM attachments WHERE meeting_id = %s", (meeting_id,))
+        cursor.execute("DELETE FROM attendees WHERE meeting_id = %s", (meeting_id,))
+        
+        # Delete meeting
+        cursor.execute("DELETE FROM meetings WHERE meeting_id = %s", (meeting_id,))
+        
+        connection.commit()
+        return {"message": "Meeting deleted successfully"}
+
+@router.post("/meetings/{meeting_id}/regenerate-summary")
+def regenerate_summary(meeting_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # Check if meeting exists
+        cursor.execute("SELECT meeting_id FROM meetings WHERE meeting_id = %s", (meeting_id,))
+        if not cursor.fetchone():
+            raise HTTPException(status_code=404, detail="Meeting not found")
+        
+        # For now, return a mock summary
+        # In a real implementation, this would call an AI service
+        mock_summary = """# AI 生成摘要
+
+## 主要议题
+- 项目进度回顾
+- 技术方案讨论
+- 下阶段规划
+
+## 关键决策
+- 采用新的技术架构
+- 调整项目时间节点
+- 分配任务责任
+
+## 后续行动
+- [ ] 完成技术方案文档
+- [ ] 安排下次会议时间
+- [ ] 跟进项目进度"""
+        
+        # Update meeting summary
+        cursor.execute(
+            "UPDATE meetings SET summary = %s WHERE meeting_id = %s", 
+            (mock_summary, meeting_id)
+        )
+        connection.commit()
+        
+        return {"summary": mock_summary}
+
+@router.get("/meetings/{meeting_id}/edit", response_model=Meeting)
+def get_meeting_for_edit(meeting_id: int):
+    """Get meeting details with full attendee information for editing"""
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        query = '''
+            SELECT 
+                m.meeting_id, m.title, m.meeting_time, m.summary, m.created_at, 
+                m.user_id as creator_id, u.caption as creator_username,
+                af.file_path as audio_file_path
+            FROM meetings m
+            JOIN users u ON m.user_id = u.user_id
+            LEFT JOIN audio_files af ON m.meeting_id = af.meeting_id
+            WHERE m.meeting_id = %s
+        '''
+        cursor.execute(query, (meeting_id,))
+        meeting = cursor.fetchone()
+
+        if not meeting:
+            raise HTTPException(status_code=404, detail="Meeting not found")
+
+        # Get attendees with full info for editing
+        attendees_query = '''
+        SELECT u.user_id, u.caption
+        FROM attendees a
+        JOIN users u ON a.user_id = u.user_id
+        WHERE a.meeting_id = %s
+        '''
+        cursor.execute(attendees_query, (meeting['meeting_id'],))
+        attendees_data = cursor.fetchall()
+        attendees = [{'user_id': row['user_id'], 'caption': row['caption']} for row in attendees_data]
+
+        meeting_data = Meeting(
+            meeting_id=meeting['meeting_id'],
+            title=meeting['title'],
+            meeting_time=meeting['meeting_time'],
+            summary=meeting['summary'],
+            created_at=meeting['created_at'],
+            attendees=attendees,
+            creator_id=meeting['creator_id'],
+            creator_username=meeting['creator_username']
+        )
+        
+        # Add audio file path if exists
+        if meeting['audio_file_path']:
+            meeting_data.audio_file_path = meeting['audio_file_path']
+        
+        return meeting_data
+
+@router.post("/meetings/upload-audio")
+async def upload_audio(
+    audio_file: UploadFile = File(...),
+    meeting_id: int = Form(...)
+):
+    # Validate file extension
+    file_extension = os.path.splitext(audio_file.filename)[1].lower()
+    if file_extension not in ALLOWED_EXTENSIONS:
+        raise HTTPException(
+            status_code=400, 
+            detail=f"Unsupported file type. Allowed types: {', '.join(ALLOWED_EXTENSIONS)}"
+        )
+    
+    # Check file size
+    if audio_file.size > MAX_FILE_SIZE:
+        raise HTTPException(
+            status_code=400,
+            detail="File size exceeds 100MB limit"
+        )
+    
+    # Generate unique filename
+    unique_filename = f"{uuid.uuid4()}{file_extension}"
+    file_path = AUDIO_DIR / unique_filename
+    
+    # Store only relative path for database (audio/filename)
+    relative_path = f"audio/{unique_filename}"
+    
+    # Save file
+    try:
+        with open(file_path, "wb") as buffer:
+            shutil.copyfileobj(audio_file.file, buffer)
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to save file: {str(e)}")
+    
+    # Save file info to database
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        # Check if meeting exists
+        cursor.execute("SELECT meeting_id FROM meetings WHERE meeting_id = %s", (meeting_id,))
+        if not cursor.fetchone():
+            # Clean up uploaded file if meeting doesn't exist
+            os.remove(file_path)
+            raise HTTPException(status_code=404, detail="Meeting not found")
+        
+        # Insert audio file record
+        insert_query = '''
+            INSERT INTO audio_files (meeting_id, file_name, file_path, file_size, upload_time)
+            VALUES (%s, %s, %s, %s, NOW())
+            ON DUPLICATE KEY UPDATE
+            file_name = VALUES(file_name),
+            file_path = VALUES(file_path),
+            file_size = VALUES(file_size),
+            upload_time = VALUES(upload_time)
+        '''
+        cursor.execute(insert_query, (meeting_id, audio_file.filename, relative_path, audio_file.size))
+        connection.commit()
+    
+    return {
+        "message": "Audio file uploaded successfully",
+        "file_name": audio_file.filename,
+        "file_path": relative_path
+    }
+
+@router.get("/meetings/{meeting_id}/audio")
+def get_audio_file(meeting_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        query = '''
+            SELECT file_name, file_path, file_size, upload_time
+            FROM audio_files 
+            WHERE meeting_id = %s
+        '''
+        cursor.execute(query, (meeting_id,))
+        audio_file = cursor.fetchone()
+        
+        if not audio_file:
+            raise HTTPException(status_code=404, detail="Audio file not found for this meeting")
+        
+        return {
+            "file_name": audio_file['file_name'],
+            "file_path": audio_file['file_path'],
+            "file_size": audio_file['file_size'],
+            "upload_time": audio_file['upload_time']
+        }
diff --git a/app/api/endpoints/users.py b/app/api/endpoints/users.py
new file mode 100644
index 0000000..627617d
--- /dev/null
+++ b/app/api/endpoints/users.py
@@ -0,0 +1,54 @@
+
+from fastapi import APIRouter, HTTPException
+from app.models.models import UserInfo
+from app.core.database import get_db_connection
+
+router = APIRouter()
+
+@router.get("/users", response_model=list[UserInfo])
+def get_all_users():
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        query = '''
+            SELECT 
+                user_id, username, caption, email, created_at,
+                (SELECT COUNT(*) FROM meetings WHERE user_id = u.user_id) as meetings_created,
+                (SELECT COUNT(*) FROM attendees WHERE user_id = u.user_id) as meetings_attended
+            FROM users u
+            ORDER BY caption ASC
+        '''
+        cursor.execute(query)
+        users = cursor.fetchall()
+        
+        return [UserInfo(**user) for user in users]
+
+@router.get("/users/{user_id}", response_model=UserInfo)
+def get_user_info(user_id: int):
+    with get_db_connection() as connection:
+        cursor = connection.cursor(dictionary=True)
+        
+        user_query = "SELECT user_id, username, caption, email, created_at FROM users WHERE user_id = %s"
+        cursor.execute(user_query, (user_id,))
+        user = cursor.fetchone()
+        
+        if not user:
+            raise HTTPException(status_code=404, detail="用户不存在")
+        
+        created_query = "SELECT COUNT(*) as count FROM meetings WHERE user_id = %s"
+        cursor.execute(created_query, (user_id,))
+        meetings_created = cursor.fetchone()['count']
+        
+        attended_query = "SELECT COUNT(*) as count FROM attendees WHERE user_id = %s"
+        cursor.execute(attended_query, (user_id,))
+        meetings_attended = cursor.fetchone()['count']
+        
+        return UserInfo(
+            user_id=user['user_id'],
+            username=user['username'],
+            caption=user['caption'],
+            email=user['email'],
+            created_at=user['created_at'],
+            meetings_created=meetings_created,
+            meetings_attended=meetings_attended
+        )
diff --git a/app/core/config.py b/app/core/config.py
new file mode 100644
index 0000000..7e0968d
--- /dev/null
+++ b/app/core/config.py
@@ -0,0 +1,32 @@
+import os
+from pathlib import Path
+
+# 基础路径配置
+BASE_DIR = Path(__file__).parent.parent.parent
+UPLOAD_DIR = BASE_DIR / "uploads"
+AUDIO_DIR = UPLOAD_DIR / "audio"
+
+# 文件上传配置
+ALLOWED_EXTENSIONS = {".mp3", ".wav", ".m4a", ".mpeg", ".mp4"}
+MAX_FILE_SIZE = 100 * 1024 * 1024  # 100MB
+
+# 确保上传目录存在
+UPLOAD_DIR.mkdir(exist_ok=True)
+AUDIO_DIR.mkdir(exist_ok=True)
+
+# 数据库配置
+DATABASE_CONFIG = {
+    'host': os.getenv('DB_HOST', 'localhost'),
+    'user': os.getenv('DB_USER', 'root'),
+    'password': os.getenv('DB_PASSWORD', ''),
+    'database': os.getenv('DB_NAME', 'imeeting'),
+    'port': int(os.getenv('DB_PORT', '3306')),
+    'charset': 'utf8mb4'
+}
+
+# API配置
+API_CONFIG = {
+    'host': os.getenv('API_HOST', '0.0.0.0'),
+    'port': int(os.getenv('API_PORT', '8000')),
+    'cors_origins': os.getenv('CORS_ORIGINS', 'http://localhost:5173').split(',')
+}
\ No newline at end of file
diff --git a/app/core/database.py b/app/core/database.py
new file mode 100644
index 0000000..dc42fbf
--- /dev/null
+++ b/app/core/database.py
@@ -0,0 +1,27 @@
+
+from fastapi import HTTPException
+import mysql.connector
+from mysql.connector import Error
+from contextlib import contextmanager
+
+DB_CONFIG = {
+    'host': 'localhost',
+    'database': 'imeeting',
+    'user': 'root',
+    'password': 'sagacity',
+    'port': 3306,
+    'charset': 'utf8mb4'
+}
+
+@contextmanager
+def get_db_connection():
+    connection = None
+    try:
+        connection = mysql.connector.connect(**DB_CONFIG)
+        yield connection
+    except Error as e:
+        print(f"数据库连接错误: {e}")
+        raise HTTPException(status_code=500, detail="数据库连接失败")
+    finally:
+        if connection and connection.is_connected():
+            connection.close()
diff --git a/app/models/models.py b/app/models/models.py
new file mode 100644
index 0000000..3c387aa
--- /dev/null
+++ b/app/models/models.py
@@ -0,0 +1,58 @@
+
+from pydantic import BaseModel, EmailStr
+from typing import Optional, Union, List
+import datetime
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+class LoginResponse(BaseModel):
+    user_id: int
+    username: str
+    caption: str
+    email: EmailStr
+    token: str
+
+class UserInfo(BaseModel):
+    user_id: int
+    username: str
+    caption: str
+    email: EmailStr
+    created_at: datetime.datetime
+    meetings_created: int
+    meetings_attended: int
+
+class AttendeeInfo(BaseModel):
+    user_id: int
+    caption: str
+
+class Meeting(BaseModel):
+    meeting_id: int
+    title: str
+    meeting_time: Optional[datetime.datetime]
+    summary: Optional[str]
+    created_at: datetime.datetime
+    attendees: Union[List[str], List[AttendeeInfo]]  # Support both formats
+    creator_id: int
+    creator_username: str
+    audio_file_path: Optional[str] = None
+
+class TranscriptSegment(BaseModel):
+    segment_id: int
+    meeting_id: int
+    speaker_tag: str
+    start_time_ms: int
+    end_time_ms: int
+    text_content: str
+
+class CreateMeetingRequest(BaseModel):
+    title: str
+    meeting_time: Optional[datetime.datetime]
+    attendee_ids: list[int]
+
+class UpdateMeetingRequest(BaseModel):
+    title: str
+    meeting_time: Optional[datetime.datetime]
+    summary: Optional[str]
+    attendee_ids: list[int]
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..7be2e59
--- /dev/null
+++ b/main.py
@@ -0,0 +1,38 @@
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from app.api.endpoints import auth, users, meetings
+from app.core.config import UPLOAD_DIR, API_CONFIG
+import os
+
+app = FastAPI(
+    title="iMeeting API",
+    description="智慧会议系统API",
+    version="1.0.0"
+)
+
+# 添加CORS中间件
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=API_CONFIG['cors_origins'],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 静态文件服务 - 提供音频文件下载
+if UPLOAD_DIR.exists():
+    app.mount("/uploads", StaticFiles(directory=str(UPLOAD_DIR)), name="uploads")
+
+# 包含API路由
+app.include_router(auth.router, prefix="/api", tags=["Authentication"])
+app.include_router(users.router, prefix="/api", tags=["Users"])
+app.include_router(meetings.router, prefix="/api", tags=["Meetings"])
+
+@app.get("/")
+def read_root():
+    return {"message": "Welcome to iMeeting API"}
+
+if __name__ == "__main__":
+    uvicorn.run(app, host=API_CONFIG['host'], port=API_CONFIG['port'])
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..8e764a7
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+fastapi
+mysql-connector-python
+uvicorn[standard]
+python-multipart
+pydantic[email]
+passlib[bcrypt]
\ No newline at end of file
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